The invention relates to the field of water pump detection, and in particular, relates to a new energy automobile cooling water pump sealing performance detection structure which comprises a structure shell, a hydraulic cylinder and a steam generator are fixedly welded to the top end face of the structure shell, a hydraulic rod is connected to the output end of the hydraulic cylinder, and a mounting plate is fixedly welded to the bottom end of the hydraulic rod; the mounting plate is slidably connected into the structural shell in a limiting manner, a driving assembly and a detection assembly are mounted on the mounting plate, a fixed bottom plate is fixedly welded to the bottom end face of the interior of the structural shell, a clamping and positioning assembly is mounted in the fixed bottom plate, and a first sealing assembly is mounted on the driving assembly; a second sealing assembly is mounted at the bottom end of an elastic telescopic hose, and the elastic telescopic hose is fixed to the mounting plate through bolts; and the problems that an existing detection structure cannot conduct rapid, accurate and visual detection analysis and comparison work on the sealing performance of a water pump to be detected in the using process, and practicability is poor are solved.