The invention discloses a method for simulating three-dimensional point cloud imaging of a laser radar used for a ship. The method comprises the following steps: firstly, setting scene attributes andsimulating various types of initial state information of a scene; secondly, constructing the scene in an on-line mode and an off-line mode to generate basic initial state information, with the information forming a data source of follow-up actual calculation; thirdly, resolving result data of a triangular surface of a scanned object mark, and generating final scanning result point cloud information through judgment and synthesis of object mark point cloud results; and finally, realizing visualization of a laser radar scanning effect by utilizing an OpenGL technology, and providing three-dimensional visual information. According to the method, different parameters of the laser radar and different distance orientations of the target can be set, and the working environment of the laser radarcan be flexibly constructed; a three-dimensional point cloud file in a specified format can be stored according to the simulation working condition so that the file can be used by other software conveniently, visual information of the laser radar scanning effect is added, and observation of experimenters is facilitated.