The utility model discloses a device for evaluating fracturing propping agents compressive strength, including barrel, piston, inside the barrel was placed in to said piston, the setting was used for conveniently taking out the screw support bracket of piston outside the barrel, and is provided with the screw hole with screw support bracket matched with on the piston. Said screw thread support is equipped with two bilateral symmetry's nut is connected with the screw hole seted up on the piston through the bolt. The outer wall of barrel is provided with the handle. The barrel bottom is provided with the chassis. The chassis is provided with the draw-in groove that combines together with the barrel bottom surface. Go back on the chassis is provided with a hasp for pinning barrel bottom periphery. The circumference outside of barrel also is provided with the trapezoid support. The utility model provides high testing result accuracy and detection efficiency make the operation more safe and simple.