The utility model provides a gas tightness test technical field's waterproof test fixture of electronic product single -point and test system, includes: the test station, the test station is used forcarrying on spacingly to the piece that awaits measuring, at least one pressurization sealing mechanism, pressurization sealing mechanism includes: primary shaft displacement driving subassembly, drive assembly and primary shaft displacement assembly, wherein, primary shaft displacement assembly passes through drive assembly with primary shaft displacement driving subassembly and links to each other back -and -forth movement in primary shaft orientation, primary shaft displacement assembly tip is equipped with sealed pressure head, is equipped with fluid passage in the sealed pressure head, and fluid passage includes fluid inlet and fluid issuing, and sealed pressure head is pressed on awaiting measuring and the fluid that lets in set pressure carries out waterproof test. The utility modeldiscloses can carry out waterproof test to regional area on the electronic product, investigate waterproof failure cause in convenient research and development and the manufacture process to improveddesign eliminates and reveals hidden danger or strengthen handling the waterproof performance who improves local structure to waterproof vulnerable area.