Crawler cranes encounter obstacles such as buildings during lifting operations, necessitating the assurance of lifting safety to prevent casualties and property losses. In response to these challenges, an interpolation algorithm path planning is proposed, and a virtual simulation system for crawler cranes is developed based on Unity 3D. The system includes a crawler crane path planning module, which combines the initial position and lifting position of the crane to design and plan the lifting path, avoiding obstacles on the path and generating a new lifting path as needed. Through simulation, the crane is able to reach the final work location. The results indicate that the positional accuracy is within 0.1 m. The maximum error between the actual path and the planned path is 0.39 m, with an average error of 0.1 m.