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1. A left atrial appendage ligator, comprising a ligature and an operating handle, one end of the operating handle is fixedly connected with a support rod, an inner wall of the support rod is fixedly connected with a feeding pipe and a locking pipe, a first sliding groove is formed in an inner side wall of the feeding pipe, an inner side wall of the first sliding groove is slidably connected with a first sliding block, a middle part of the first sliding block is fixedly connected with a feeding push rod, one end of the feeding push rod is fixedly connected with a first hook, one side of the first sliding block is fixedly connected with a return spring, a second sliding groove is formed in an inner side wall of the locking pipe, the second sliding groove is internally slidably connected with a second sliding block, one end of the second sliding block is fixedly connected with a second hook, the other end of the second sliding block is fixedly connected with a locking push rod, a sliding cavity is formed in the inner sidewall of the locking pipe, adjacent to the second sliding groove, of the locking pipe, a supporting component is inserted in the sliding cavity, one end of the ligature is wound at a middle part of the ligature to form a hanger knot so as to form a loop at the middle part of the ligature in a surrounding manner, and the loop is arranged at one end of an outer wall of the supporting component; the feeding pipe comprises a straight pipe portion and a guide portion, one end of the guide portion is in threaded connection with the straight pipe portion, the locking pipe comprises a fixing portion and a detaching portion; and one end of the detaching portion is in threaded connection with the fixing portion, and the one end of the ligature threading through the guide portion is attached to a surface of the first hook, and the other end of the ligature threading through the detaching portion is attached to a surface of the second hook.
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