The invention discloses a re-pressing machine for laminating bamboo boards. The re-pressing machine comprises a top plate, a bottom plate, and a plurality of vertical columns which are arranged vertically and in parallel with with each other, wherein each vertical column comprises a left vertical column, a right vertical column, a support plate and a transverse pressure plate, a left sliding groove and a right sliding groove are respectively symmetrically formed in the opposite directions of each left vertical column and right vertical column, and the support plates and the transverse pressure plates are sequentially connected in the left sliding grooves and the right sliding grooves from bottom to top; the top plate and the bottom plate respectively penetrate through the vertical columns and are movably placed between the support plates and the transverse pressure plates; and the glued bamboo boards to be hot-pressed are positioned between the top plate and the bottom plate, and a plurality of jacks are arranged between the bamboo boards and the top plate. The re-pressing machine for laminating the bamboo boards is simple in structure, does not require a power source, saves energy, improves the evenness performance of the formed bamboo boards, improves the aging resistance of a bamboo product made by the bamboo boards, and prolongs the service life of the bamboo product made by the bamboo boards.