Compression-shear testing machine and quick locking device thereof

The utility model relates to a compression-shear testing machine and a quick locking device thereof. The compression-shear testing machine comprises a vertical loading mechanism with a loading plate,the vertical loading mechanism comprises a vertical loading cylinder connected with the loading plate through a rapid locking device; the quick locking device comprises a device base of an annular structure. The device seat is fixed on the lower plate surface of the loading plate; the device seat comprises an upper box plate, a lower box plate, and an inner ring and an outer ring which are fixed between the upper box plate and the lower box plate; at least two guide grooves extending in the radial direction of the inner ring are distributed in the inner ring in the circumferential direction. Alocking block is assembled in each guide groove in a guiding and moving mode, a locking block locking spring is arranged between the outer ring and the locking block, an unlocking hydraulic cylinderin transmission connection