The invention provides a cell phone projector including a housing, a circuit device, a power supply, a projector module, wherein the circuit device and the power supply are disposed in the housing, and the projector module is displaced at one end of the housing, and wherein the housing is provided with a fence-type slot for insertion of a cell phone. The cell phone is inserted into the slot to thereby achieve to connect the cell phone with a projector. In use, a video signal within the cell phone can be easily output through the projector, to bring a better visual effect for users, and it is convenient for people to watch the video.