The invention discloses an anti-icing wind power blade and a preparation method of the anti-icing wind power blade. The anti-icing wind power blade comprises a monitoring system, a peripheral power supply and a blade body provided with a macromolecule electrothermal film, wherein the macromolecule electrothermal film is arranged between the surface of a suction surface shell body and the surface of a pressure surface shell body of the anti-icing wind power blade or between shell body layers of the anti-icing wind power blade in a clamped mode, and the macromolecule electrothermal film is controlled by the monitoring system through a wire to be connected or disconnected with the peripheral power supply. At the time of operation, the monitoring system monitors icing parameters of an environment where the blade body is located, the peripheral power supply is connected when the icing parameters meet preset icing conditions, the macromolecule electrothermal film is powered on to emit heat, the heat is transmitted to the surface of the blade body, and the blade body is prevented from icing. According to the anti-icing wind power blade and the preparation method of the anti-icing wind power blade, the anti-icing wind power blade can be prevented from icing in an online mode under the condition of no machine halt, non-planned machine halts can be reduced, and wind energy utilization efficiency of a wind machine in frigid weather is improved. The anti-icing wind power blade is simple in preparation technology, high in operability, and free from extra complex processes and devices. The preparation method can be used for preparing a large anti-icing wind power blade. The anti-icing wind power blade and the preparation method of the anti-icing wind power blade are beneficial to popularization and implementation.