Fixing structure of detachable battery pack and cleaning device

A fixing structure of a detachable battery pack comprises a battery box body, the battery pack and a spring bolt assembly. The battery box body is provided with a battery bin used for containing the battery pack, and the spring bolt assembly is installed in the battery box body. The spring bolt assembly comprises a lock shell, a button and a spring bolt. The lock shell is fixed on the battery boxbody; the button is installed in the lock shell to move, the spring bolt is installed in the lock shell to move in the direction different from the moving direction of the button, the button is connected with the spring bolt in a matched mode, the button drives the spring bolt to move when being pressed to move, and the button and the spring bolt reset after pressing disappears. The battery pack is provided with a lock groove, and the spring bolt extends into the battery bin and is inserted into the lock groove to be matched with the lock groove. The lock tongue of the lock tongue assembly ismatched with the lock groo