To deal with the shortcomings existing in the single polarization image of traces,such as weak gray contrast,incomplete trace feature,etc,multiple polarization images of traces are fused by wavelet image fusion to improve the visual effect of trace image effectively.Referring to the trace evidence examination,the low-frequency fusion coefficients are calculated by the region-based gradient square sum rule,and the high-frequency fusion coefficients are calculated by the region-based coefficient absolute maximum rule.As an example,the designed scheme is applied to enhance the polarization image of vehicle tire trace left on the clothes.Experimental results show that the processed polarization image of vehicle tire trace can achieve the good enhancement of image edges and details,which is evaluated by both subjective judgment and objective criterion,and meet requirements of the judicial identification of trace evidence.