In this paper,a new image processing method was put forward based on median filter and wavelet transform about weather radar echo,and analysed from a vision standpoint of target echo and objective standpoint of statistic.The experiment results show that the method not only can efficiently remove mixed Gaussian and impulse noise in echo image,but also preserve the echo image edge information.Echo image processed by the method can obtain good vision effect and abundant level sense.The processing performance is obviously superior to traditional image processing method,offers good foundation for auto-recognising echo sort research.