Abstract: The defects of Zhujiazhan Sluice,operated for 39 years, have seriously affected its safety. Safety inspection is carried out according to "Rules for Safety Appraisal of Sluics", and the indexes of sluice appraisal analysis are divided into three parts, namely utilizing level, damage degree and renovation feasibility. And the safety grade of the sluice is appraised. Results show that the sluice belong to the third-class sluice, and that the sluice should be strengthened as early as possible to assure its safe operation.