Abstract: In order to guide the orderly withdrawal of some old or small hydropower with water disputes in Chongqing City, and to release the water resources contradiction, the withdrawal mechanism of small hydropower was studied.Based on summarizing the research results of old small hydropower in the world and the status of small hydropower in Chongqing City, this paper comprehensively puts forward the measurement indicators, withdrawal methods, reward and subsidy standards, and withdrawal procedures.It was pointed that scientific appraisal and comprehensive evaluation, social risk control, publicity direction and post evaluation were four major methods to ensure smooth implementation of small hydropower withdrawal.The results can provide reference for the formulation of small hydropower withdrawal policy in Chongqing City.