Machining method of microchannel parallel flow heat exchanger

The invention belongs to the technical field of heat exchanger equipment, in particular, relates to a machining method of a microchannel parallel flow heat exchanger, and solves such problems as easy deformation of traditional heat exchangers in welding. The method comprises the steps of: (A) assembly of the heat exchanger; (B) positioning of the heat exchanger; and (C) welding of the heat exchanger. The machining method of the microchannel parallel flow heat exchanger has the following advantages: a limiting rod and a chassis can prevent the expansion of the heat exchanger body in a NB furnace in welding to prevent the deformation; the heat exchanger is convenient to be disassembled, and can be recycled, so that the cost is saved; the bottom of the produced heat exchanger is hollowed to achieve the advantage of corrosion resistance; and a radiating fin and a flat tube are firmly inserted, so that the release is not liable to generate, and the installation stability of the radiating fin is enhanced.