The paper discussed application technology about composite material preform stitch measured using wavelet transform. The system is rested on the multi scale analysis of wavelet transform. By selecting appropriate wavelet basis

the surface image of composite material preform may be processed and show ideal information of image edge. When a texture template selected

match point about iamge will be make out by revolution algorithm. Through measuring distance of match point

the stitch of perform may be brought out. When compared with other filtering mode

it proves that wavelet transform can reduce noise while preserving image edge features. The experiments show that tested results are consisted with handiwork. This system proved that it is possible for stitch of composite material preform will be analyzed using wavelet transform.