The abnormal wear of conveying belt in enterprise production was analyzed, and in combination with the actual site conditions, a method for computing the abnormal wear of conveying belt with the abnormal wear of the systematic annual conveying belt as the reference was proposed. The method focuses on building test indexes of conveying belt consumption reasonably and comparison of reasonable consumption of conveying belt between the belt conveyor systems, and the classification and causes of abnormal wear of the conveying belt and its protection technologies were described for reference in the same industry.