Abstract: Joint transform correlator(JTC) was applied to track the moving target in foggy weather or the other low visibility environment, to solve the low recognition ratio problem caused by low contrast and low visibility characteristic of the target and the background noise interference in this environment, a pre-processing method based on multi-wavelet enhancement was applied, it can use different methods to process the high and low frequency coefficients according to the different feathers of the decomposition coefficients on the basis of the multi-wavelet transform merits, which can make the processed image undistorted, simultaneously enhance the contrast and the target edge, and suppress the background noise. The optical correlation experiments on a large number of moving targets captured in a simulation fog environment show that this method can effectively enhance the efficiency of the moving target tracking in foggy weather environment and verify the feasibility of this algorithm.