This invention is a single-startup double sealed parallel sluice board valve, and belongs to F16K field of International Patent Classifying Form. It includes an exterior shell of the valve gate, which is composed of a valve case, a valve cover, a connector and a hand wheel. In the chamber of the valve casing are the valve pole and the sluice board. The hand wheel drives the nut of the valve pole, the nut drives the valve pole, and the pole drives the sluice board through the trapeziform thread, at the bottom of the interior chamber of the valve case is a power-fixing rod, the sluice board train is composed of two symmetrical sluice boards, on the top of the board is a T-shaped groove that is used to connected fixedly with the valve rod, in the middle of the board is a big through hole linking to the flow hole on the two ends of the valve case, above the big hole is a wedging slipper groove, the bottom of the big hole is connected with the small passage. This invention solves the problems of low-pressure sealing and power cannot be add manually. Its characteristics are: novel design, special exterior, small size, light weight, easily switches and energy saving, and it is suitable for the pipelines of oil chemistry and other industry of transferring the fluid medium.