In response to the reinforcing bars design of the anchorage zone for welded bearing plates blisters, a novel Strut-and-tie model was proposed. Firstly, the analysis of six typical effects principal stress traces and force equilibrium relationships in the blisters anchorage zone was conducted and a new strut-and-tie model was established accordingly. Secondly, the parameters of the strut-and-tie model were quantitatively designed based on relevant design codes and recommendations from the American Association of State Highway and Transportation Officials (AASHTO) Load-and-resistance Factor Design Bridge Design Specifications, Building Code Requirements for Structural Concrete and Commentary (ACI 318-19), Specifications for Design of Highway Reinforced Concrete and Prestressed Concrete Bridges and Culverts (JTG 3362—2018), and European design recommendations Practical Design of Structural Concrete. A formula for calculating the splitting force in the anchorage zone of the welded bearing plates blisters was derived using the geometric relationship of the strut-and-tie model. Finite element analysis was employed to fit the formula and obtain the calculation formula for the center of splitting force in the anchorage zone of the welded bearing plates blisters. Finally, Through case analysis, the proposed strut-and-tie method was applied for the reinforcing bars design of the anchorage zone of the welded bearing plates blisters. It effectively controls typical effects in the anchorage zone and is comparatively safer than the design method provided by Specifications for Design of Highway Reinforced Concrete and Prestressed Concrete Bridges and Culverts (JTG 3362—2018). The strut-and-tie model method effectively reflects the structural force mechanism and is feasible and applicable, and can serve as a reference for the reinforcing bars design of the anchorage zone of the welded bearing plate blisters.