The utility model relates to an auxiliary bracket for installation of a secondary valve. The auxiliary bracket is characterized in that the bracket comprises a support plate; a through hole is arranged in the middle of the support plate; and a plurality of position giving holes using the through hole as the symmetrical center are arranged at the support plate. And handles are symmetrically and fixedly connected to the two sides of the support plate, wherein handles and the support plate are located at the same plane. According to the auxiliary bracket provided by the utility model, the support plate enables the operating space to be enlarged; the through hole and the position giving holes enable a protruding structure of the bottom surface of the secondary valve to be avoided; and the handles arranged at the two sides of the support plate enables the auxiliary bracket to be used and stored conveniently. When being used, the auxiliary bracket is placed flatly; the secondary valve is placed on the support plate; the auxiliary bracket is lifted, so that the secondary valve is at the installing position for installation; and after the installation is completed, the auxiliary bracket is removed. Therefore, the provided auxiliary bracket has the advantages of increased operating space, simple structure, and practicability and convenience.