Concrete fracture resistance testing machine

The utility model relates to the technical field of concrete fracture resistance tests, in particular to a concrete fracture resistance testing machine which comprises a placing table, a supporting seat, a back plate, a limiting plate, a limiting box and a positioning plate, the limiting plate, the limiting box and the positioning plate are arranged on the outer wall of the back plate from top to bottom, and a stamping testing mechanism is arranged on the side edge of the limiting plate. When the concrete fracture resistance testing machine is used, due to the fact that the sizes of concrete blocks needing to be detected are different, generally, the same kind of machine can only detect a single concrete stone block, and the concrete blocks are not prone to being damaged. And through arrangement of a limiting shaft, a driving gear, a worm gear, a rack, a protective shell, a positioning strip, an abutting block, a rubber pad, a worm and a driving motor, the device can adaptively achieve a good clamping effect