The invention discloses a vertical-horizontal overall-sliding type side mold of a fulcrum-few support, and relates to the technical field of continuous beam bridge box girder construction. The vertical-horizontal overall-sliding type side mold of the fulcrum-few support saves labor and time, is safe and efficient, comprises a flange mold plate (1), a web mold plate (2), a supporting truss (3) and traveling idler wheels (8), and further comprises a builder jack walkway (5), a flange stop plate (4), a cross support (6), hook bolts (7), supporting lead screws (9), a bearing beam (11), a split threaded rod, a vertical traction system and a horizontal traction system. According to the vertical-horizontal overall-sliding type side mold of the fulcrum-few support, side plates of a box girder can be disassembled, transferred, assembled, adjusted in an elevation mode and the like at a time, the construction difficulty can be effectively reduced, the construction speed can be accelerated, the number of construction devices can be decreased, the construction safety can be guaranteed, and the construction cost can be saved.