The invention discloses a dual-lateral surface supported bearing pedestal installation structure, which is characterized in that: a pair of support plates which refers to an air cylinder side support plate and a screw rod side support plate respectively is arranged on a bottom plate vertically in parallel; a bearing pedestal is clamped between the pair of support plates to form an H-shaped structure; longitudinal linear guide rails are arranged on inner sides of the support plates vertically; the bearing pedestal is in an H shape and consists of a central base and two lateral vertical plates; installation plates are fixedly arranged on outer sides of the lateral vertical plates respectively and are supported by the longitudinal linear guide rail on the support plate on one corresponding side in a sliding mode; a screw rod nut regulating mechanism is arranged between the screw rod side support plate and one corresponding lateral vertical plate of the bearing pedestal; and an adjustment nut which is fixedly connected with the vertical plates of the bearing pedestal is driven to ascend and descend by a screw rod driven by a servo motor, so that the height of the bearing pedestal is adjusted. The dual-lateral surface supported bearing pedestal installation structure can regulate an axial lead of the bearing pedestal flexibly and conveniently in the height direction to adapt to tests of different varieties.