Mechanical thrombus removing device and method

The invention discloses a mechanical thrombus removing device and method.The mechanical thrombus removing device comprises a collecting tank, a thrombus removing catheter, a thrombus cutting assembly and a guide wire, the interior of the collecting tank is in a negative pressure state and communicates with the thrombus removing catheter, and in other words, the interior of the thrombus removing catheter is in the negative pressure state; the thrombus cutting assembly comprises an inner blade, an outer blade, a flexible transmission shaft and a power assembly for driving the flexible transmission shaft to rotate, the outer blade is slidably mounted at the head of the thrombus removing catheter, and the flexible transmission shaft drives the inner blade to rotate; a pushing piece is arranged on the power assembly and can drive the inner blade and the outer blade to extend out of the head of the thrombus removing catheter; a first cavity is formed in the middle of the thrombus removing catheter, and a second cav