The invention discloses a regulating valve. The valve comprises a valve body, an upper valve cover and a lower valve cover, an upper valve seat, a lower valve seat, a worm gear, a worm, a screw plugand a valve element; wherein an inlet channel and an outlet channel are formed in the valve body; the upper valve seat and the lower valve seat are in interference fit in the valve body; the lower endof the lower valve seat and the lower end of the lower valve seat are in threaded connection with the lower valve cover; the worm gear is connected with the middle part of the lower valve seat in a sleeved mode; the worm is meshed with the worm gear; the screw plug is connected to the upper part of the upper valve cover; and an upper valve clack and a lower valve clack are arranged on the valve element. According to the adjusting valve, reliable sealing can be guaranteed, and the adjusting is convenient.