Based on analyzing and discussing the sand body CT fault image features in tectonic physical simulation experimental sand box, some technical schemes and methods of sand body CT image processing are proposed. By comparing the results of different image enhancement algorithms, image filtering algorithms for sand body CT image processing, the processing accuracy and efficiency of these methods are analyzed. On this basis, aiming at the characteristics of sand body CT sequence images, such as blurs, poor quality and obscure boundary between the layers, an improved template matching algorithm is proposed. The new method can effectively reduce the noise, strengthen the image characteristics, and extract effective sand layer mark lines more integrally.