A steel arch rib and concrete base force transfer section transition full-grid chamber connecting device comprises a three-way prestressed concrete arch rib force transfer section poured and solidified on a concrete base, and the end face of the three-way prestressed concrete arch rib force transfer section is connected with a steel arch rib through a full-grid chamber steel-concrete connecting section. The concrete base comprises a pile foundation and a pile foundation bearing platform foundation poured on the pile foundation, and an arch seat is poured on the pile foundation bearing platformfoundation; the three-way prestressed concrete arch rib force transmission section comprises a concrete arch rib poured and solidified on the arch support, and the concrete arch rib is internally connected with the concrete base through transverse prestressed reinforcements and vertical prestressed reinforcements; and the concrete arch rib and the end surface of the steel arch rib are anchored and connected by the full-grid chamber steel-concrete connecting section through a plurality of longitudinal prestressed steel strands which penetrate through the full-grid chamber steel-concrete connecting section. According to the utility model, the overall pressure bearing capacity of the combination section is greatly improved, and tight connection between the steel arch rib and the concrete base can be realized.