Abstract: This study introduces a new weight-DSmT to diagnose a motor with vibration fault. DST and DSmT have something illogical in dealing with high conflicting evidences. This weight assignment method takes into account the quantity, confidence level and mutual support level of different evidences. Proportion Conflict Redistribution rule 4 based on DSmT was used to fuse. Results indicate this method advanced the basic belief assignment, although it has not been proposed in literature so far and could serve as useful method in some fusion problems.