The invention discloses a human pathological or iatrogenic cavity blocking device. The device comprises a sheathing canal and a push rod, wherein an elastic anchor is connected to the front end of the push rod and comprises an anchoring base connected with the front end of the push rod, and a plurality of elastic puncturing arms connected with the anchoring base, and an acupuncturing part is arranged at the tail end of each acupuncturing arm; the elastic anchor is compressed and placed in the sheathing canal together with the push rod, and after the elastic anchor disengages from the sheathing canal, the puncturing arms rebound off to form claw-shaped anchors. The device is operated in the same way as ordinary instruments in cavities and has the advantages that operation is easy, the blocking effect is good, and the number of residues in a cavity is small.