The utility model relates to a SVG blower control circuit comprising a control system; two independent power supply loop are employed, and an electric interlock forms a blower and heater interlock loop; the SVG blower control circuit also comprises an AC380V power incoming line, a blower loop, a heater loop, and an open-phase protector; the blower loop and the heater loop are respectively connected with the AC380V power incoming line connected with the open-phase protector; the blower loop is opened and closed by the control system; the advantages are that two independent power supply loop are employed, and the electric interlock forms the blower and heater interlock loop; power is reliably used so as to prevent two device, with opposite functions, from working in a same time, and thus causing power waste; the total incoming line is provided with the open-phase protector, when three-phase power supply fault is detected, the power supply loop can be automatically cut off, thus protecting the blower and the heater.