The rockfall trajectories are affected by many kinematic parameters. So it is very necessary to exactly analyze the sensitivity of rockfall kinematic parameters to the control indices for design of protective structures. In this paper, the kinematics combined with the orthogonal test is adopted to analyze the sensitivity of rockfall kinematic parameters. Taking the rockfall hazard near the DK27+120 section of the jing-ying expressway in china for example, three control indices are taken as the testing indices, and five kinematic parameters are taken as the testing factors. The orthogonal test table is used to design twenty-five kinds of schemes, and the numerical simulation tests of rockfall trajectories are carried out. The range analysis are performed to study the sensitivity of rockfall kinematic parameters, and then the main parameters influencing the control indices for design of protective structures are obtained, which provides scientific basis for the rockfall prevention in jing-ying expressway.