Touch system and multi-point positioning method

The invention discloses a touch system and a multi-point positioning method. The touch system comprises a main touch positioning system, a pair of infrared geminate transistor arrays and a processing unit, wherein the main touch positioning system is used for positioning a touch object to obtain the preliminary introduction position information of the touch object; the infrared geminate transistor arrays are used for acquiring the one-dimension position information of the touch object; and the processing unit is connected with the main touch positioning system and the infrared geminate transistor arrays, and is used for confirming the position information of the touch object according to the preliminary position information of the touch object and the one-dimension position information and sending the position information to a main controller. By using the touch system and multi-point positioning method provided by the invention, a ghost point can be eliminated effectively, and the multi-point positioning is realized.