The invention discloses a binding mechanism for the gantry frame of a container crane and a binding method of the binding mechanism. The binding mechanism comprises a gantry frame and hinge point typestay bars; the hinge point type stay bars are connected inside gantry frame bodies; the inner side of one edge of each gantry frame body is provided with first supporting seat plates; the inner sideof the other edge of each gantry frame body is provided with a second supporting seat plate; first positioning holes are formed in the first supporting seat plates respectively; second positioning holes are formed in the second supporting seat plate; the diameter of the first positioning holes is equal to the diameter of the second positioning holes; the diameter of the first positioning holes andthe diameter of the second positioning holes are both are equal to the diameter of hinge point shafts; a first hinge hole is formed in one end of the hinge point type stay bar, and a second hinge hole is formed in the other end of the hinge point type stay bar; the diameter of the first hinge hole is smaller than the diameter of the second hinge hole, and the diameter of the first hinge hole is equal to the diameter of the hinge point shaft; one end of the hinge point type stay bar is overlapped with the corresponding first positioning hole through the first hinge hole and is fixed to the corresponding first supporting seat plate through the hinge point shaft, and the other end of the hinge point type stay bar is overlapped with one second positioning hole through the second hinge hole and is welded to cladding plates in a matched manner so as to be fixed to the second supporting seat plate, wherein the cladding plates are located outside the second hinge point hole.