An identification method for simultaneously identifying multiple touch points on a touch screen, which includes the following steps: a first step, mounting some optical signal transmitting terminals and some optical signal receiving terminals around the touch screen; a second step, when some touch points appear on the touch screen, performing horizontal and vertical scans to get a preliminary location region; a third step, performing maximum positive inclination revising on the preliminary location region in the second step; a fourth step, performing maximum negative inclination revising on the region in the third step; a fifth step, some said optical signal transmitting terminals transmit optical signal in turn, inclination corresponding receiving terminals correspond to some said optical signal transmitting terminals are controlled in a receiving state in turn; a sixth step, filtering the locations of touch points in the fifth step, removing error points off, finally determining the location results of some said touch points, and finishing the whole identification process.