Physiology of plants under stress is impotents field of Phytophysiology.A considerable amount of research has been done on plants under stress,for example,effect of drought.High temperature,low temperature,not right soil PH,high pressure on plants has seldom been reported.This experiment studied the effect of high pressure on germination of wheat seed and activities of amylase,peroxidase,superoxide dismut （SOD）of wheat seedling,and very important regulations have been found.