The utility model provides a wave soldering positioning jig for LEDs. In the wave soldering positioning jig for LEDs, a printed board is only positioned with a cover board, so that errors caused by secondary positioning are avoided, the positions of lamp holes on the cover board are in accurate correspondence with those of lamp bodies on the printed board, and the lamp bodies are always perpendicular to the printed board during soldering; such defects of traditional soldering tools as inaccurate positioning, expansion and deformation after heating, complicated assembly and the like are overcome; elastic structures are arranged on ribs at the bottom of a support board, so as to remarkably absorb the deformation of the support board caused by heating; improvements such as the position design of the lamp holes on the cover board and limit devices can further ensure that the lamp bodies are perpendicular to the printed board during and after soldering; and the wave soldering positioning jig for LEDs remarkably eliminates the phenomena of color lumps, floatation of some lamp bodies, bright-spot defects, modular images and the like on large LED displays.