The invention discloses a manufacturing method for a quick-cooling computer case. The method comprises the following steps of 1, welding a case body; 2, arranging baffles; 3, digging the case body; 4, arranging a circulating pipe; 5, arranging a condensing bag; 6, filling the condensing bag with a condensing liquid; 7, folding the condensing bag; 8, mounting a mainboard; 9, electrically connecting the baffles with the mainboard, and mounting fans, blowing air to the mainboard, on the baffles on two sides of the mainboard; and 10, casting a cover fastened to the top end of the case body through a metal plate, and fastening the cover to the top end of the case body, thereby finishing the manufacturing of the quick-cooling computer case. The quick-cooling computer case manufactured with the method is good in cooling effect.