The embodiment of the invention relates to the technical field of projection, in particular to a laser projection device. On the one hand, the laser projection device is used for improving the dust prevention degree of dust sensitive parts inside the laser projection device; and on the other hand, the laser projection device aims at improving the heat dissipation efficiency of a heat source part inside the laser projection device. In the embodiment, a laser source part externally comprises a sealing shell, and the dust prevention degree of the laser source part is improved. Further, heat produced by the laser source part and heat produced by a laser machine part are both guided into a heat centralizing module through heat guide tubes, the heat on the heat centralizing module is dissipated through heat dissipation modules in a centralized mode, the purpose of dissipating the heat of the laser source part and the laser machine part is achieved, direct heat dissipation conducted on the laser source part and the laser machine part is not needed in the process, and the problem that dust is brought to the laser source part and the laser machine part in the heat dissipation process is prevented. In addition, due to the fact that the heat on the heat centralizing module is dissipated in the centralized mode, the heat dissipation efficiency is improved.