The invention discloses a method for manufacturing an evaporator of an immersion type ice maker. The method comprises: processing an aluminum strip and a threaded hole by using a pultrusion mold; machining an aluminum bar and threads by using a lathe; fixedly connecting the aluminum strip and the aluminum bar; clamping a U-shaped evaporation copper tube into a U-shaped groove of the aluminum strip; welding a return pipe with a port 9B of the U-shaped evaporation copper tube; welding a capillary tube and an ice removing pipe with a port 9B of the U-shaped evaporation copper; and welding a support with the U-shaped evaporation copper. The method overcomes the problems that the prior complex manufacturing process has high manufacturing cost and low reliability.