Double-crankshaft plunger type mud pump

The utility model discloses a double-crankshaft plunger type mud pump, which comprises a crankshaft box, two crankshafts, a connecting rod, a sliding block, a sliding sleeve, a sliding short shaft, a water outlet valve, a box body, a piston, a cylinder sleeve, an end cover, a water inlet valve, an intermediate sleeve and a piston cylinder. The crankshaft box is connected with the box body through the intermediate sleeve, the two crankshafts, the connecting rod, the sliding block and the sliding sleeve are arranged in the crankshaft box, the two crankshafts are connected with the sliding block through the connecting rod, the sliding block is arranged in the sliding sleeve, one end of the sliding short shaft is connected with the sliding block, the other end of the sliding short shaft is connected with the piston, the water outlet valve is arranged at the upper end of the box body, the water inlet valve is arranged at the lower end of the box body, the cylinder sleeve is arranged in the box body in a propping w