To avoid the rolling stone hitting on bridge piers, a new anti-collision rigid structure design was proposed. First, a fine simulation methodology for simulating the collision between the rolling stone and anti-collision structure was given using the nonlinearity, contact algorithm, and constitutive relation in the dynamics theory, and the key parameters in this simulation were suggested. Then the entire collision process was analyzed by ANSYS／LS-DYNA program, and the simulation stabilization was verified from the system energy viewpoint. Finally, a design criterion of this anti-collision rigid structure for bridge piers was built in terms of damage-released energy and energy conversion efficiency. Based on the results the proposed simulation methodology shows its good feasibility and rationality and the expected anti-collision effects of such structure are proved.