The structure of changeable spring of industrial glasses comprises a plastic glasses frame; a hinge means comprising a first hinge member and a second hinge member, the first hinge member fixed on one the of the glasses frame and pivotally connected with one side of the second hinge member by a screw, the other side of the second hinge member being form a hole of the screw thread; a spring; a rivet pin connected to the hole of the second hinge member and fixed by screw thread; two glasses temples formed a tunnel in the top, located the spring and the rivet pin, and the side of the glasses temple top located a pit; and a assembly element which the part of it put into the tunnel of the glasses temple and located a recess, the dimension the same as the rivet pin, connected with the spring and the rivet pin and the portion of it as a cap filled with the pit of the glasses temple.