Safety positioning device for hanging calibration weights of belt weigher

The utility model relates to the technical field of belt weigher calibration, in particular to a belt weigher calibration weight hanging safety positioning device which comprises a positioning stop lever, a clamping assembly, a hook, a holding rod and an adjusting assembly. A groove is formed in the top end of the positioning stop lever, and a first sliding groove is formed in the peripheral wall of the bottom of the positioning stop lever; the clamping assembly comprises a fixing frame and a sliding block, a second sliding groove is formed in the side wall of the fixing frame, the bottom of the fixing frame is hinged to the groove, and the sliding block is in sliding fit with the second sliding groove; the hook is fixedly arranged at the bottom of the positioning stop lever; the holding rod is slidably arranged in the first sliding groove. The adjusting assembly comprises a connecting mechanism and a reset mechanism, the two ends of the connecting mechanism are fixedly connected with the sliding block and th