A multi-touch system is provided. In the multi-touch system, there is a plurality of touch sensing sub-systems. The touch sensing sub-systems are arranged in a touch sensing row in sequence and the touch sensing row has a pair of longitudinal sides opposite to each other and a pair of end sides opposite to each other. A light reflective frame is configured on one of the longitudinal sides and both of the end sides. Each of the touch sensing sub-systems comprises at least two sensors arranged at two corners of the corresponding touch sensing sub-system at one longitudinal side opposite to the other longitudinal side having the light reflective frame arranged thereon. A sensing range of both of the sensor covers the corresponding touch sensing sub-system.