Numerical-control electrically operated valve

The invention discloses a numerical-control electrically operated valve which comprises a motor, a ball valve, a valve driving circuit board, an infrared sensor and a fan-shaped blocking piece. A motor rotating shaft is coaxially connected with a ball valve rotating shaft. The valve driving circuit board is at least provided with a motor driving interface, a power interface, a digital signal control port and an infrared feedback signal port. The motor is electrically connected with the motor driving interface on the valve driving circuit board. The infrared sensor is electrically connected with the infrared feedback signal port on the valve driving circuit board. The circle center of the fan-shaped blocking piece is fixedly arranged at the axis of the motor rotating shaft. When the ball valve is just opened or completely closed, the fan-shaped blocking piece is just rotated to the receiving end of the infrared sensor, and signal blockage to the infrared sensor is formed. According to the electrically operated valve, opening and closing of the ball valve and the aperture of the ball valve can be rapidly and effectively controlled through simple operation of an external control circuit, and the numerical-control electrically operated valve is simple in structure, flexible to control and high in controllability.