Backwash control method and device

The invention discloses a backwashing control method and device. The backwashing control method comprises the steps that a backwashing signal is received, and the backwashing signal is sent out by a control terminal when the operation state of the water circulation equipment meets a preset condition; receiving a first water level obtained by detecting the water level of a secondary water tank by a detection device according to the backwashing signal; if the first water level exceeds a preset first water level threshold value, backwashing operation is sequentially carried out on the filtering tanks in a filtering tank group, and the filtering tank group comprises a plurality of filtering tanks. When the running state of the water circulation equipment meets the preset condition, the filtering tanks in the filtering tank group are sequentially subjected to backwashing operation, so that the filtering tanks can be comprehensively flushed in time, pipeline blockage is prevented, overload and even damage of a wate