Digital directional flow valve

The invention provides a digital directional flow valve. The digital directional flow valve comprises a baffle, a nozzle, a main valve element, a constant-difference overflow valve and a damping hole, wherein the baffle is driven by a stepping motor; the baffle driven by the stepping motor is arranged at the front end of the nozzle, and a gap is reserved between the baffle driven by the stepping motor and the nozzle; the constant-difference overflow valve is arranged at the parallel end of the main valve element, and a cavity allowing an overflow valve spring to be contained is formed in the constant-difference overflow valve; the damping hole is further formed in the center line of the constant-difference overflow valve. The digital directional flow valve can be conveniently connected with a computer interface, the structure of the valve is simplified, and the cost is lowered; the hysteresis errors of the digital directional flow valve are small, and the reliability and the interference resistance of the digital directional flow valve are good. The digital directional flow valve has no special requirements for a valve body, thereby being high in adaptability.