The invention discloses a corrosion-resistant welding steel structure beneficial to solder circulation and a manufacturing method thereof. The steel structure comprises a base body provided with a hole to be welded and a cylindrical pin shaft, wherein 6-10 feeding ports are equidistantly arranged along an end face edge corresponding to the opening of the hole to be welded before welding the cylindrical pin shaft, the lower part of each feeding port is provided with 2-3 branch-shaped first-level liquid separation channels; the bottom of each first-level liquid separation channel is also provided with two second-level liquid separation channels; the middle parts of the lowest liquid separation channels is vertically provided with an air hole directly passing through the outer edge of the endface corresponding to the opening of the hole to be welded and the cylindrical pin shaft; and the lowest liquid separation channels are communicated one by one. The steel structure has the advantagesof strong pertinence, full and compact filling liquid, good air tightness, few and discontinuous air holes, difficult welding blockage and no oxidation of welding seams.