Novel uterine cavity expander

The invention discloses a novel uterine cavity expander. The novel uterine cavity expander comprises a plurality of expansion wires, an inner tube, a sheath tube and a tee joint, wherein the expansion wires are closed rings made of materials having the shape memory function, the front end of the inner tube is fixedly connected with the expansion wires, and the tail end of the inner tube is fixedly connected with the main path end of the tee joint; the sheath tube is sleeved outside the inner tube. The novel uterine cavity expander is a uterus expansion device which is easy to operate and high in reliability, avoids injuries to the human body caused by mechanical uterus expansion and gas uterus expansion, and avoids obstacles brought by liquid uterus expansion to visualized induced abortion operation. The novel uterine cavity expander is simple in structure, reliable in performance, and convenient to disassemble and disinfect.