A left atrial appendage occluder (100) comprises an elastic closure disc (11) connected to a fixing structure (111) which is located on one side of the closure disc. The fixing structure (111) comprises a central end portion connecting with the closure disc and a plurality of interconnected and curved struts (121), wherein at least one anchoring tip (131) is provided near the end of at least one strut (121) with the anchoring tip (131) directed toward the closure disc (11). The left atrial appendage occluder has a stable structure, a good positioning and sealing effect on the cavity wall in the left atrial appendage, and it is easy to position repeatedly. It can also be recycled before separating from a deployment device. When in surgical operation, the left atrial appendage occluder can select the position area based on the actual shape and size of the patient's left atrial appendage, so the surgical risk is lowered.