Air knife cooling device

The utility model relates to the technical field of circuit board production, in particular to an air knife cooling device. Comprising a device body, a cooling mechanism and an air knife assembly. A cooling mechanism is arranged in the device body, the cooling mechanism comprises a cooling cavity and a cooling pipe, the air knife assembly comprises an upper air knife and a lower air knife, and a conveying channel is formed between the upper air knife and the lower air knife and used for conveying circuit boards; the air outlet end of the cooling cavity is respectively communicated with the air inlet ends of the upper air knife and the lower air knife, so that cooling air can be blown out from the air outlets of the upper air knife and the lower air knife to cool the circuit board; compared with the prior art, the cooling mechanism is arranged between the fan and the air knife, the cooling mechanism can cool air, and then the cooled air is conveyed to the air knife to be blown out, so that the cooling capacity