Fin rotating mechanism capable of dynamically measuring fin lift force

The invention provides a fin rotating mechanism capable of dynamically measuring fin lift force, which comprises a fin shaft, wherein an end fin sleeve of the fin shaft is provided with an anti-rolling fin; an end circle center position at the other end of the fin shaft is provided with a potentiometer type fin angle measuring transducer to form a fin angle feedback box to serve as a fin angle feedback mechanism; the fin shaft realizes double-support fixation through two bearings; a box body realizes dynamic seal with the fin shaft and is welded on a boat hull; the fin shaft is a hollow fin shaft, and a solid shaft core is arranged in the hollow fin shaft, is firmly connected with a jacket of the fin shaft close to a fin mounting position and can rotate along with the fin shaft; and a lift force measuring transducer is fixedly arranged at the tail end of the solid shaft core. The fin rotating mechanism designed by the invention can directly acquire the dynamic lift force of a fin, avoid the non-linear relationship between an angle of attack and the lift force, and reduce the phase lag caused by the angle of attack in an angle servo.