The invention provides a connection joint applicable to a prefabricated container house. The connection joint mainly comprises a joint plate, shear keys on the joint plate, shear key cover plates, spring bolts, bolts, draw bars and springs. The shear key cover plates are connected with the shear keys by the bolts, an upper container and a lower container are connected with each other in such a manner that seal plates of upright columns of the containers are fastened by the spring bolts, and the size of the joint plate and the quantity of the shear keys on the joint plate are designed, so that a left container, a right container, a front container and a back container can be connected with one another. The designed spring bolts have end surfaces with different inclination degrees, can extend into slide channels under the effects of the self weights of the containers and can be automatically popped up after the containers are dropped, so that the upper and lower upright columns can be guaranteed against being separated from one another when tensile force is borne by the upright columns of the containers, only container positioning and dropping work needs to be carried out in sites, any welding or bolt mounting and tightening work can be omitted, and purposes of quickly mounting and safely utilizing the container house can be achieved. The connection joint of the prefabricated container house has the advantages that any manual operation is basically omitted in the sites owing to a joint connection mode of the connection joint, only the container positioning and dropping work needs to be carried out, and accordingly problems of large quantity of manual operation, small operation spaces, capability of connecting only an upper container, a lower container, a left container and a right container with one another and the like in an existing joint connection mode can be solved.