Battery box, replacing device thereof and electric automobile using battery box

The utility model discloses a battery box, a replacing device thereof and an electric automobile using the battery box, and the battery box comprises an outer box body and an inner box body; the inner box body is installed in the outer box body in a suspended mode through the damping mechanism. The bottom of the outer box body is provided with a guide sliding strip matched with the bottom of a mounting socket of the electric automobile. The outer box body is further symmetrically provided with locking mechanisms used for locking the outer box body in the electric vehicle installation insertion opening. The locking mechanism comprises a resettable spring bolt device and an unlocking device for driving the spring bolt device to unlock; an operation groove is formed in the front end face of the outer box body; and the unlocking device is exposed in the operation groove. The outer box body of the battery box is inserted into the electric vehicle mounting socket and is locked in the electric vehicle mounting socke