Smart emptying fuel filter

The invention discloses a smart emptying fuel filter. The smart emptying fuel filter comprises an engine ECU, a fuel filter for cleaning fuel, and a vacuum source forming device; an air inlet end of the vacuum source forming device keeps communication with the fuel filter; the vacuum source forming device has an exhaust end and an execution signal input interface; and the vacuum source forming device is connected with the engine ECU through the execution signal input interface to control a working state, and is communicated with an oil tank through the exhaust end and an exhaust pipeline. The smart emptying fuel filter integrates the vacuum source forming device based on a traditional fuel filter; and massive air separated out from fuel in the fuel filter is preferably excluded under the negative-pressure effect of vacuum source formation, and includes gas permeated in caused by weak sealing of related parts of a fuel system, so that the problems of difficult starting and incapability of starting an internal