Abstract: Under the hot environment the changing of wrinkle recovery angle(WRA) of fabrics finished by shape memory polymer with temperature is discussed.The result shows that under both hot water and air environment the fabrics can respond to temperature with a significant increase of the WRA at stimuli temperature about 60℃.It indicated that at about switch temperature the shape memory fabrics remember its set shape and recover to flat shape.Under the same temperature the wrinkle recovery time in hot air is much longer than in hot water due to the different coefficients of heat transmission.Nonlinear regression analysis method was used for finding the relationship between the wrinkle recovery angle and the temperature of shape memory fabrics in hot environment.The result shows that there is logarithm relationship between them.The function of the wrinkle recovery angle with temperature in hot water isy=3.446 7x0.557 9,and the function in hot air isy=3.282 0x0.591 0.