Container automatic fixing device

The utility model provides a container automatic fixing device, which comprises a container body, wherein the bottom of the container body is fixed with locking devices, and the top of the container body is fixed with tightening devices, each tightening device is connected with the corresponding locking device through a brake cable; each locking device comprises an outer sleeve, an inner sleeve, a rotating shaft and a lock; the top of the container body is provided with hoist holes for hoisting, and the tightening devices are fixed in the hoist holes; each tightening device comprises a pressing block arranged on the upper bottom surface of the corresponding hoist hole in a up-down sliding manner, the upper end of each pressing block is provided with a spring which enables the pressing block to move down, the side wall of each hoist hole is provided with a bracing wire hole, and each brake cable is connected to the side wall of the corresponding block after penetrating through the corresponding bracing wire ho