After hair transplant my hairs are rough. How much time It will take to go back to normal?

If you have problems with your hair transplant results you should contact your doctor for a recheck or exam.  What you describe is not common.

It is not uncommon for the transplanted hair to be more coarse and curly following a hair transplant. This usually will work itself out over time. We see in our patients that it can take up to a year or more before the hair returns to "normal". In the meantime, you can dry your hair with a blow dryer while gently pulling with a hair brush, to straighten it and try other hair products to help with your styling options.

I have seen this problem in about 4 patients out of 15000 surgeries and in these 4 patients, the kinky hair stayed.