The invention relates to a polygonal strain resistor gasket. The structure of the polygonal strain resistor gasket is that, a gasket body is polygonal, grooves are formed in the upper surface and the lower surface of the body, outer edges of the grooves protrude out of the body, connecting faces of the outer edges of the grooves and the body are oblique, each connecting face is evenly divided into a plurality of oblique faces corresponding to the number of edges of the body, and gaps are formed between the oblique faces; an elastic plate is arranged on the side face of the body, and a strain resistor piece is arranged on the outer surface of the elastic plate. The polygonal strain resistor gasket is suitable for measuring pressing degrees of various mechanical components, potential device operation hazards can be eliminated in time, and safe device operation is guaranteed.