Back in 1984, when we were professional secondary students, we went to Longkang farm in Huaiyuan County for ptracticeining.

“we went to Longkang farm in Huaiyuan County" sounds very natural. You would only add "the" if you were talking about an unspecific location or if you were trying to emphasize a specific location's prestige.

You could also say "when we were vocational students". Vocational schooling is schooling you receive to prepare you for a specific type of job. Vocational training is usually a type of post-secondary education for adults, but there are some programs for teenagers so it wouldn't sound odd.

We would not only do itwork in the daytime, but also work in the night, and the wholthrough the night.

When we did the night shift, late at night, we were supplied with mutton soup.

It really tasted and it seemed I had netasted very good and I thought I must never before haver eaten such a delicious meal.

"it seemed I had never eaten such a delicious meal" is not incorrect, but in this situation it sounds a little unnatural.

"Seemed" would work if you were talking about your COWORKERS eating the food, for example: " it seemed (as though) they had never eaten such a delicious meal" because you aren't them and you can't really know how they feel about the food. Since you are talking about your own experiences, using a distant word like "seemed" doesn't sound exactly right.

An interesting thing I remember from when we drove the tractors I still remember clearly is tis that I hatd a female classmate who was very thin and small and she just had 30-40 kilograms weight, so her weight, maybe only about 30-40 kilograms, meaning she was too light to stepwork the clutch, even though she. She would even stooand on the clutch pedal, but the clutch didn't move even a little.

I understand what you wanted to say. It was only minor grammar details that need correction.

Weight: In English you don't say someone "had weight", you instead say "they are" or "they weigh".
Example:
"they are 30 kilograms" or "they are 88 pounds"
"they weigh 30 kilograms" or "they weigh 88 pounds"
(and, wow, she was extremely light for a person!)

"clutch didn't move":
"didn't move at all" and "didn't move even a little" both mean the same thing.
"didn't move a little" doesn't work.

There awere no other good methods to solve this problem and she had to give up.

Every morning when I geot up, we canI would see a thin morning mist and a lot of colorful morning glories on the wattled wall.

The weather at that time in the mornings was alreadyways a little cold and we had to wear a coats.

"we" (plural) = "coats" (plural)

The clothes I wore then were a cardigan that my older brother bought for me and it, which was really fashionable at thate time.

"at the time" or "in that time" are both okay ways to say it.

I can even remember howwhat it looksed like.

The ptracticeining lasted for one month or so, and lafter on,ward we returned to our school to continue our studies.

"later on" sounds like there was a big gap between leaving training and going back to school. "afterward" means you finished training and then went right back to school.

It's autumn again, and itwhich always brings me some good memories.

When you say this, this means that you get good memories out of every autumn.
If you meant that autumn makes you think about this particular story you told, you would say:
It's autumn again, which always reminds me about some good memories.

Back in 1984, when we were professional secondary students, we went to the Longkang fFarm in Huaiyuan County for practice.

I took out the word "professional" - with professional, it sounds like your job is to be a secondary student :)

I changed "Longkang farm" to "the Longkang Farm" because you were referring to a specific farm with this name, so that becomes a proper noun and every word gets capitalized.

We nNot only do it id we work during the day, but also work in the night, and the wholthrough the night.

Saying "through the night" in the night/the whole night combined :)

When we did the night shift, late at night, we were supplied withwe were given mutton soup.

you don't need to say "late at night" because that is referred from the "night shift"

"supplied with" is too strong of a phrase here, instead I used "given"

It really tasted and it seemedtasted really good! I had never eaten such a delicious meal before.

In English, you can't say "something tasted" - it has to taste like something (example: it tasted good, it tasted bad)
I changed the rest of the sentence to make it sound smoother

AnSomething interesting thingI still remember from when we drove the tractors I still remember clearly is that a female classmate was very thin and, small, and she weighed just had 30-40 kilograms weight, so her weight. She was too light to step on the clutch, even though she stood on the clutch pedalit, but the clutch didn't move a lbittle.

cleaned the sentence to make it sound smoother
when you write a list, instead of saying "and ... and ... and", you can just separate it with commas and have one "and" at the end

There awere no other good methods to solve this problem and she had to give up.

Every morning when I geot up, we can seesaw a thin morning mist and a lot of colorful morning glories on the wattled wall.

you are talking about the past, so your verbs need to be in past tense

The clothes I wore then were a cardigan that my older brother bought for me and it, which was really fashionable at that time.

I can evenstill remember how it looks.

The practiceapprenticeship lasted for one month or so and later on, we returned to our school to continue our studies.

ok, so you wouldn't say a "practice" here because it was a job. there's two words you can use instead:
internship -> a short job that you do in school, but it's done in an office, school, etc.
apprenticeship -> a short job that you do in school, but it has to do with handwork (farming, carpentry, etc.)