Infrared touch pen and infrared virtual touch system

The embodiment of the invention provides an infrared touch pen and an infrared virtual touch system. The infrared touch pen comprises a pen body, a pen point light guide column, an infrared LED light-emitting module, a spring and a voltage conversion plate, wherein the pen point light guide column is arranged at the end of the pen body, and the head of the pen point light guide column extends outwards from the interior of the pen body; the infrared LED light-emitting module comprises an infrared LED lamp and a circuit substrate; two ends of the spring are respectively connected with the circuit substrate and the voltage conversion plate; one side, connected with the spring, of the voltage conversion plate is fixedly connected with a spring thimble; a gap is formed between the spring thimble and the LED light-emitting module; and one side, not connected with the spring, of the voltage conversion plate is connected with a direct-current power supply module. According to the infrared touch pen and the infrared v