The invention discloses a method for adjusting a nonuniform machining allowance of a propeller. The method overcomes the defect that the nonuniform machining allowance of the propeller needs to be manually adjusted, the pose of a design model is automatically adjusted according to a technological tolerance and the current machining allowance distribution situation, quick matching between a propeller blank model and the design model is achieved on the premise that the tolerance standard is met, the situation that the machining allowance of a blank is uniform is guaranteed, and machining quality of blades is improved.