The invention discloses a motor valve which is mainly used for opening or closing control of various intelligent gas meters. The motor valve comprises a valve body, a valve cover and an execution component; the valve body is provided with an air inlet and an air outlet; the valve cover is arranged at the air outlet side; the execution component is connected with the valve cover; the motor valve ischaracterized in that: the valve body is an unfilled-corner rectangular valve body; the air outlet of the valve body is an oblique air outlet; the valve cover adopts a turnover typed valve cover; when the valve cover of the motor valve is opened, the airflow linearly passes through the valve body; therefore, the minimum pressure loss and maximum flux can be obtained, the motor valve overcomes thedefects of large air pressure loss and unreliable switching action existing in the prior art and has the advantages of reasonable structure, reliable switching, large flux, low pressure loss, and thelike.