The invention discloses an anti-intrauterine adhesion device made from polyethylene materials. The anti-intrauterine adhesion device is in a Y type. The anti-intrauterine adhesion device is composed of a wing, an isolating membrane, a handle and a tail fiber, and is provided with a placer. One end of the wing is connected with the handle of an intrauterine device, the tail end of the wing is in a pointless round shape, and a T-shaped clamping groove is formed in the inner side face of the wing. The handle is in a cylinder shape, one end of the handle is connected with the wing, a tail fiber hole is formed in the other end of the handle, and the tail fiber is fixed to the handle through the tail fiber hole. The isolating membrane is a sector-shaped soft silicon gel film, the two sides of the isolating membrane are fixed to the wing, the tail end of the isolating membrane is free, and the tail end of the wing is sleeved with sleeves arranged on the two sides of the tail end. During placing, the anti- intrauterine adhesion device is sleeved with a casing under pulling of the tail fiber, the wing in a closed state, the isolating membrane is in a foldable state, and after the device is pushed out of the casing through a pushing rod, the wing naturally spreads, and the isolating membrane naturally spreads to be laid flat inside the uterine cavity.