Hull preventing propeller from being twined

The invention relates to the technical field of hull machine manufacturing, in particular to a hull preventing a propeller from being twined. The hull is provided with a hull body. A ship stern tube is arranged at the bottom of the hull body. A transmission shaft is arranged in the ship stern tube. One end of the transmission shaft extends into the ship stern tube to be connected with a hull powersystem, and the other end of the transmission shaft extends out of the ship stern tube to be connected with a shaft sleeve in the middle of the propeller. The hull preventing the propeller from beingtwined is characterized in that a strip-shaped cutter is arranged on the shaft sleeve of the propeller, an annular groove is formed in the side face of the ship stern tube, one end of the strip-shaped cutter is connected with the shaft sleeve of the propeller, a sliding block is arranged at the other end of the strip-shaped cutter and extends into the annular groove, the strip-shaped cutter is driven through rotation of t