This newly battery washing tester consisting of test chamber and washing chamber under the test chamber. Moreover, it motorized rotary propeller mounted inside of the test chamber and on the internal wall of test chamber, the drying system is mounted. This battery washing tester is designed as a lifting structure chamber which forms a sealed casing when the washing chamber rises to the upper edge of the test chamber. The control panel and water tank are designed on the rack, and the washing chamber is connected to the water tank. Reasonable test chamber structure shortens the test period and improves test accuracy.