The invention relates to a simulating calculation algorithm for root curvilinear type equal thickness stacked leaf spring pre-clamping stress, and belongs to the technical field of suspension steel plate springs. On the basis of the number of spring leaves, structural parameters of each spring leaf, a design value of the free tangent arc height and elasticity modulus, simulating calculation is performed on pre-clamping stress of each spring leaf of a root curvilinear type equal thickness stacked leaf spring obtained after a central penetrating bolt is pre-clamped. A development test shows thatthe simulating calculation algorithm for the root curvilinear type equal thickness stacked leaf spring pre-clamping stress is accurate, and the reliable technical method is provided for simulating calculation for pre-clamping stress of each spring leaf of the root curvilinear type equal thickness stacked leaf spring. By means of the method, it is ensured that the pre-clamping stress of each spring leaf meets the design requirement, the design level and reliability of the product are improved, the service life is prolonged, and the vehicle driving safety can be improved; meanwhile, the productdesign and testing cost is lowered, and the product development speed is increased.