The invention relates to stirring and heating blades with variable inclination angles. The stirring and heating blades comprise a heating device main shaft, a stirring and heating blade clamping groove and stirring and heating blades, and the stirring and heating blades with the variable inclination angles is characterized in that one ends of the stirring and heating blades are hinged to the stirring and heating blade clamping groove; and in a static state, the included angle theta between each stirring and heating blade and the main shaft is 45 degrees, when the rotating speed of the heatingdevice main shaft is increased, due to the action of centrifugal force and lift force, the included angle theta between each stirring and heating blade and the heating device main shaft are increaseduntil the included angle reaches 90 degrees at most, and each included angle theta is changed along with the rotating speed. The stirring and heating blades with the variable inclination angles has the beneficial effects that when the wind speed is low, the starting torque of the stirring and heating blades is small, when the wind speed is high, the stirring and heating blades are unfolded to do work, so that the problems that a wind energy stirring and heating device is large in starting torque and low in wind energy utilization rate are solved, the heating efficiency of an wind heating system is improved, the wind energy utilization rate is also improved, and the dual effects are achieved.