The advantage of a large rocker arm (more than 7m in length) lies in moving photography, which is impossible for ordinary airplane seats. The effect of mobile phone photography has a great relationship with the pre-designed motion trajectory. The range of motion of the rocker arm is a circle on the horizontal plane. Generally speaking, we only use a section of arc MN. On the vertical plane, it is a sector, and generally adopts an arc. The motion trajectory of the camera is the synthesis of circular motion on the horizontal plane and vertical plane. Generally speaking, the displacement of the rocker arm is not very convenient, and it is basically fixed in the program scene, especially in the case of live broadcast. Therefore, we should carefully study the program before rehearsal, such as how the people came out, where they stood, where they walked on the stage, and the number of people dancing. On the basis of "thoroughly understanding" the program, the motion trajectory of the camera is designed to meet the needs of the program to the greatest extent, and the advantages of the rocker arm are brought into play to make the program have the greatest artistic appeal. Once the trajectory is determined, the position of the rocker arm is also determined. If the program is recorded in segments, the rocker arm position should be moved as needed to adapt to different motion trajectories in the program shooting, so there is more than one anchor point. At this time, it is necessary to mark the ground in advance, and it is best to hang an object under the O point of the tripod for accurate positioning.