Self-adaptive variable-pitch and variable-pitch propeller

The propeller comprises a left propeller part, a propeller hub and a right propeller part, the left propeller part comprises a left propeller blade, a left propeller handle of the left propeller blade is in clearance fit with a sliding sleeve on the propeller hub, the right end of the left propeller handle is rotationally connected with a left rotating sleeve, a left gear cavity is fixed to the right end of the left rotating sleeve, and the left gear cavity is in sliding connection with the propeller hub in the left-right direction; the left front connecting rod is in transmission connection with the left paddle handle through a bevel gear, the right end of the left front connecting rod is hinged to the left end of the right front connecting rod through a front sliding rod, and the right end of the left rear connecting rod is hinged to the left end of the right rear connecting rod through a rear sliding rod; the front sliding rod and the rear sliding rod are connected in a sliding mode in the front-back direc