The dynamic impact effect is not considered in the design of the suspension spanning frame in previous work. In order to explore the impact resistance law of the suspension spanning frame under different engineering parameters, the impact simulation model of the ultra high molecular weight polyethylene (UHMWPE) rope used in the load-bearing cable of the suspension spanning frame is established in this paper. The influence of different engineering parameters on the impact resistance of the suspension spanning frame under accident conditions of broken wire and running wire is studied. Research results show that the minimum error between the dynamic simulation based on truss element and the experiment is 0.67%. The simulation results show that the impact load of broken wire on the suspension spanning frame is about 2~3 times that of the running wire due to the appearance of the traction plate. The impact load of the suspension spanning frame increases with the height of the fall wires, but the law of the change has some randomness. The sag changed is 4~4.5 m. Besides, the safety factor of the middle cable and the insulation net is smaller than other parts of the suspension spanning frame. The linear density and the traction plate mass of the 1 250 mm² conductor is larger than that of the 630 mm² conductor. Therefore, the 1 250 mm² conductor has larger impact on the suspension spanning frame.