The utility model discloses a fuel filters water accumulating cup of system with valve that drains relates to the technical field who uses magnetic force. The valve that drains includes valve body anddisk seat, valve body and disk seat pass through bolt support cooperation connecting bolt fixed connection, the disk seat on be equipped with the filter mantle, the inside center of valve body and disk seat is run through there is the push rod, the upper end overcoat of push rod is equipped with the spring that is used for the return, but the lower extreme overcoat of push rod is equipped with the iron core that moves of follow -up, has an iron core of deciding at the interior fixed surface of valve body, the iron core of deciding locate and move iron core top to leave the clearance with thepush rod, deciding the iron core and moving the iron core outer lane to be equipped with the coil in being fixed in the valve body. The valve that drains can carry out automatic drainage to water accumulating cup as required under the control of controller, solve the fuel and filter the inconvenient problem of system's drainage, has eliminated to fire oil filter because of the filtration efficiency that long -time not drainage caused descends, filter core life reduces the scheduling problem.