In order to study motion feature of tiltrotor rotation mechanism during nacelle and the rotor turning 90 forward, and to find a more suitable rotation mode, the rotating mechanism of tiltrotor was set for the research object through a simplified mechanism model. There were three rotating patterns set for the rotating mechanism. The kinematic characteristics of each rotating pattern were calculated with MATLAB software. The rotation process of the rotating mechanism was simulated in three set patterns with LMS software. The identical curves of angular speed, speed, angular acceleration, and acceleration were plot with two kinds of software. After analyzing the various kinematic characteristic curves, we can obtain that the three patterns have their own advantages and disadvantages, as well as the applicable conditions and situations. They can be chosen due to the specific circumstances and needs.