Social condition, accompanied by booming economy and technology, has become increasingly complex, gradually increasing pressure on public security. Therefore, enhancing public security patrol performance has become important means for ensuring the security of lives and property of people. This study aimed to select a combination of public security patrol and three-dimensional (3D) path planning as the breakthrough point to explore the operating current condition and existing problems of the combination. 3D path planning under a simulation environment was implemented using bidirectional A*, rapidly exploring random tree (RRT) Extend, and RRT-Connect algorithms. Finally, the prospects of the combination of police patrol and 3D path planning were discussed to provide a new thought for the future development of police patrol.