The rotating and elevating mechanism is an important device on the Auto Cone Machine of transportation roads, and the bearing load is relatively large in the work process. In order to prevent insufficient of its structural strength and rigidity which occurred responding failure, the Finite Element Analysis (FEA) model of the rotating and elevating mechanism was built by using the ABAQUS. The static characteristic analyses of the mechanism were carried out separately in three kinds of dangerous postures during operation of the mechanism, and the force checking analysis of its main bearing component was calculated in order to ensure accurately simulating its actual situation. The locations of maximum strain and stress distribution were found out. Then taking reducing stress and strain of structure as targets, the optimization design of structure was proposed, and the structure was compared with prototype after optimization. The maximum stress and displacement are all greatly decreased. The FEA results can provide theoretical basis for design and manufacture of the mechanism and forecast technological design, and achieve the aim of shorten the design cycle and improve the working efficiency.