To solve the problems on the important ultrasonic noise and the quality degradation of data in ultrasonic imaging,a novel image enhancement algorithm by calculating the Non-stationary Degree(NSD) of the image is proposed,which highlights the rapid changes of image to realize the image enhancement.The simulation results are given for different SNR levels of input signal by applying the NSD algorithm and the Deriche operator respectively.Two successful actual applications for a rabbit's liver and a 12-week infant,are provided.The research results show that proposed algorithm is insensitive to the noise.Compared with the image without processing,it is obvious that the enhancement of the ultrasonic stereovision image is effective.