Finite element models of four typical ships from 3000DWT to 50000DWT are developed, and the time history samples of collision forces between these four ships and rigid wall at a velocity range of 1.0-5.0m/s are acquired. For the convenience to bridge design, three basic impact loading models are proposed based on the observations of time history samples of impact forces from the FEM simulations. The proposed impact loading models includes the sinusoidal model, the modified sinusoidal model, and the multi-phase model. The observations of time history samples of impact forces show that there is a simply statistical relationship between the impact duration, the impulse and the initial impact velocity, and the statistical deviation is small. The rule of equal-impulse is adopted to determined statistically the model parameters. The proposed impact loading models might be used to develop a dynamic design method for vessel-bridge collisions, to replace of the current equivalent static design method.