The utility model relates to a GRC bending strength check out test set, including bottom plate and briquetting, be provided with first supporting part and second supporting part on the bottom plate, the bottom of briquetting is provided with first pressure stick and second pressure stick, and first stick and the second of pressing presses excellent length direction perpendicular with the length direction of bottom plate. The utility model discloses following beneficial effect has: examine time measuring, put the test piece on the bottom plate, place respectively on first supporting part and second supporting part at the both ends of test piece length, press the stick to place on the test piece first pressure stick and second, excellent length direction is pressed to first pressure stick and second, and the length direction with the bottom plate is perpendicular respectively, place the briquetting on first pressure stick and second pressure stick, upper surface through to the briquetting is exerted pressure, pressure presses the stick to transmit on the test piece through first pressure stick and second, through increasing pressure test piece destruction the most at last, and then be convenient for the staff and carry out bending strength to the test piece and detect.