Embolism dredging device and thrombus suction catheter

The invention provides an embolism dredging device and a thrombus aspiration catheter, and relates to the technical field of embolism treatment.The thrombus aspiration catheter comprises a catheter body and a Y-shaped hemostasis valve, the Y-shaped hemostasis valve is installed at the near end of the catheter body, and the embolism dredging device is arranged at the near end of the Y-shaped hemostasis valve; the embolism dredging device comprises a dredging element, a supporting element and a limiting and locking element. The dredging element is located at the far end and comprises a spiral coil with a far-end tip. The far end of the supporting element is fixedly connected with the near end of the spiral coil, or the supporting element penetrates through the spiral coil and is fixedly connected with the inner wall of the spiral coil; the limiting and locking element is arranged on the outer wall of the supporting element and comprises a locking button capable of abutting against and releasing the outer wall o