The utility model discloses a multi-point touch control device of a laser pen for a projector screen. A computer is connected with a projector, a camera and an infrared emitting module respectively; the infrared emitting module is in signal connection with a laser touch control pen; and the projector and the camera are aligned with a projecting curtain respectively. The utility model has the technical effects that: clicking and positioning of the laser pen are separated, the movement of a touch control point can be controlled once a power supply of the laser touch control pen is switched on regardless of whether a touch control key is pressed down, and the press-down and lift-up of the touch control key can be detected accurately. The advantage of non-contact long-distance operation of the laser touch control pen can be brought into full play, multi-point touch control operation in a projecting system is completed, and clicking operation has very high instantaneity.