The utility model discloses a solar water heater auxiliary device based on complementation of wind power and solar energy. The device is added with an independent wind power generating system on the basis of a traditional solar water heater. A water outlet pipeline is changed into a dual-layer water outlet pipeline (a water supply pipeline of the solar water heater is arranged in the inner layer while a pipeline anti-freezing protecting layer is arranged in the outer layer). The protecting layer is filled with water and provided with a temperature sensor and an electrical bar. The independent wind power generating system provides heat to the water in the pipeline anti-freezing protecting layer by the electrical bar to ensure that the temperature of the water in the pipeline is higher than 0 degrees centigrade so as to fulfill the purpose of preventing the pipeline from being frozen in winter. Meanwhile, the wind power generating system can generate electricity for providing heat energy to be used as an auxiliary heating device of the solar water heater when the system is unnecessary to prevent pipelines from being frozen. The solar water heater auxiliary device can fulfill the purposes of preventing pipelines from being frozen, auxiliary heating, saving energy and protecting environment. Therefore, the solar water heater auxiliary device is of great significance for production practice.