A cataract lens nucleus breaker for eye surgery, comprising a tube body, an operating rod and a draw ring； the tube body is a hollow tube having a tapered portion and a thin tube portion extending outwardly from a front end thereof, and an opening portion at a rear end thereof； an edge of the opening portion has an operating portion, the tapered portion has a venting hole； the operating rod has a front end disposed in the tube body and a rear end protruding from the opening portion； the draw ring is formed by a wire having a connecting portion connected to the front end of the operating rod, and a nucleus breaking ring； the nucleus breaking ring is housed in the tapered portion and can be pushed and pulled back to the taper portion by the operating rod.
