An electric control valve provided in the present invention has a valve gate and a control actuator including a middle seat (10), a setting part (9), a thermal sensitive element (7), a pushing rod (11) and a memory alloy spring (6), wherein, the thermal sensitive element (7) is disposed within the middle seat (10) and fixed by the setting part (9), with both poles on it being connected with control terminals respectively, the thermal sensitive element (7) is surrounded by the memory alloy spring (6) and the pushing rod (11) located under the memory alloy spring from outside. Through applying operating voltage on the thermal sensitive element within the electric control valve and then swiftly transmitting heat to the memory alloy spring, when the temperature of the memory alloy spring reaches to a deforming temperature, the memory alloy spring deforms and expands and thus pushes the pushing rod to move. A core 4 and a piston are then driven to move by magnetic coupling. Therefore, the valve is controlled to be closed off. The electric control valve provided in the present invention has characteristics of low energy consuming and stable operating performance, achieving a sensitive remote control of the electric control valve.