The invention relates to a sump well for a vacuum drainage system. The sump well comprises a collection well, a sewage pumping pipe, a drainage pipe, a vacuum valve, a controller for controlling connection and disconnection of the vacuum valve and a water level sensor for collecting water level information, wherein the outlet of the drainage pipe is connected into a vacuum pipeline, and the inletof the drainage pipe is connected with the outlet of the sewage pumping pipe through the vacuum valve; the inlet of the sewage pumping pipe extends into a sewage pumping level in the collection well;and a signal output end of the water level sensor is connected with a signal input end of the controller. Along with sewage collection in the well, the sump well drains automatically and intermittently to the vacuum drainage system, has a simple structure, and does not require a lift pump, so that the problems of being low in safety, easy in blockage, difficult in cleaning, high in power consumption and the like caused by assembling the lift pumps on multiple points can be avoided, and sewage collected by gravity flow can be lifted to the vacuum drainage system without extra additional power,and the sump well is convenient to check and maintain.