Electric cage-type single-seat regulating valve, a high-performance single-seat regulating valve, is suitable for the occasions when high pressure difference is prone to flash vaporization and cavitation. The solid sleeve protects the valve body from the damage of flash vaporization and cavitation. With a streamlined S channel, the valve structure is compact, enabling low pressure drop loss, large flow and wide adjustable range. Valve core guiding area is large with good vibration resistance performance. Regulating valve leakage meets the ANSI B16.104 standard. Products conform to GB/T4213-92 and JB/T7387-94.