This utility model discloses an auxiliary installation mechanism for a regulating valve, relating to the field of regulating valve installation technology. It includes a movable seat with an adjustment groove on its surface, a support seat within the adjustment groove, a positioning bearing on the side of the support seat, a placement groove on its surface, a threaded hole on the side of the adjustment groove, a movable screw threaded into the threaded hole, a guide groove on the side of the movable seat, a guide block within the guide groove, a first cylinder on the surface of an auxiliary plate, a mounting plate on the lifting end of the first cylinder, a support plate on the surface of the mounting plate, and two sets of support plates. One set of support plates has a traction port on its surface, an auxiliary support plate within the traction port, and a bearing on the side of the auxiliary support plate. This utility model is characterized by its strong practicality and ease of stable installation of the upper and lower valve bodies.