The invention discloses a bracket for a staircase guardrail. The bracket comprises a foundation column, wherein swing bars are hinged to the bottom and the upper part of the foundation column respectively, mounting wheels are arranged at two ends of each swing bars respectively, multiple longitudinally arranged hinge pins are arranged on the front side of the foundation column, two longitudinal support plates are arranged at the top of the foundation column at an interval, a support bar is hinged between the longitudinal support plates, a connecting plate is arranged at the top of the support bar, a positioning hole is formed in the bottom end surface, and a spring positioning pin corresponding to the positioning hole is arranged on one side of the foundation column. With the adoption of the scheme, the two swing bars which are hinged to the foundation column are adopted in the bracket for the staircase guardrail to radially and fixedly connect baffles at the bottom of a staircase handrail, connection is convenient and reliable, mounting is efficient and convenient, a transverse compensation function of the baffles is considered, and mounting materials of the staircase guardrail are effectively saved, and the mounting time of the staircase guardrail is effectively shortened.