Based on numerical analysis method， some parameters are studied to clarify their influences of impact resistance capacity of one typical trolley under central impact loads， such as bracing angle， etc. With the optimal parameters obtained， two scaled test models of the optimized trolley are designed and manufactured. The central bearing capacity and the central impact resistance capacity are carried out under the static and impact tests. Results show that higher bracing angle can obtain larger impact resistance capacity， and increased yield strength materials can improve impact resistance capacity， especially after local yield occurrence. The boundary conditions have not significant effect on impact resistance of trolley. The optimized parameters can well meet the safety requirements of trolley under central impact loads. Proposed optimization analysis method and verification process can be used as a reference for future studies of trolley.