hi, is there a direct train from Xian to Zhangjiajie Hunan?

I am afraid that there is no direct train between the two places.
You need to transfer in Changsha.
From XA to Changsha, the train takes about 19 to 21 hours. Then from Changsha to ZJJ, the train takes about 6 hours.
The train ticket fare is around 297 to 320RMB for the sleeper to Changsha, while the ticket fare from Changsha to ZJJ is 48 to 55RMB for the seat.