Plate ice machine is a kind of ice machine that consists of many paralleled arranged fiber laser welded pillow plate evaporators. In the plate ice machine, the water needed to be cooled is pumped to the top of pillow plate evaporators, and flows freely on the external surface of the evaporator plates. Refrigerant is pumped to the interior of the evaporator plates and cools the water down until it is frozen, building uniformly thick ice on external surface of the evaporator plates.