Anti-freezing control method and anti-freezing control device of gas water heater

The invention relates to an anti-freezing control method and device of a gas water heater, and the anti-freezing control method comprises the steps that when it is detected that the gas water heater meets a preset anti-freezing starting condition, the average water flow of a water pump under first preset power and first operation duration is obtained; according to the pre-stored water storage volume of the gas water heater, the first operation duration and the average water flow, the operation frequency of the water pump is determined; according to the first operation duration, the average water flow and the preset unit water flow, the operation interval duration of the water pump is determined; and the electric heating device is controlled to heat according to the preset heating power, and the water pump is controlled to operate according to the first preset power, the operation interval duration, the first operation duration and the operation frequency during the heating period of the electric heating devic