High-precision liquid flow regulating valve

The invention discloses a high-precision liquid flow regulating valve which comprises a valve body, a mechanical transmission mechanism, a rotary digital encoder, a regulating valve controller and a microswitch assembly. The mechanical transmission mechanism comprises a transmission threaded rod, a gear transmission mechanism and a driving motor, the valve body is connected with the transmission threaded rod, the transmission threaded rod is connected with the driving motor through the gear transmission mechanism, the driving motor is connected with the rotary digital encoder, and the rotary digital encoder outputs signals to the adjusting valve controller so that the driving motor can act. The top of the transmission threaded rod is provided with a valve opening limiting piece, the valve opening limiting piece triggers the microswitch assembly, and the microswitch assembly plays a role in protecting the valve body. According to the high-precision liquid flow regulating valve, the opening and closing executio