The invention relates to the field of medical instruments and aims to provide an atrium well generator for surgical operations. It consists of two upper and lower rings set on the movable rod, the lower ring is a semi-closed pressure ring (1) with one end open, the upper ring is a ring seat (3) matching the pressure ring (1), and the movable rod is A pull rod (2) that is set in a hollow outer tube (4) for linear motion, wherein the open end of the pressure ring (1) is fixed on the bottom of the pull rod (2), and the ring seat (3) is fixed on the outer tube (4) bottom of. The advantage of the atrial well generator of the present invention is that it can simplify the generation of atrial wells under minimally invasive conditions, there is no bleeding around the incision, it is convenient, safe and reliable to use, it reduces the difficulty of surgery, and it can meet the needs of atrial wells in specific situations. .