A method and apparatus for identifying a trajectory on a touch screen solves many limitations that the stylus and the gesture operation currently subjected to in the operation state of the touch screen. For example, due to the chaotic operation caused by the stylus and the gesture operation, it is difficult to distinguish the actual operation attributes such that the operation is too cumbersome and not straightforward, resulting in the technical problem of low user experience. The method for identifying a trajectory on a touch screen includes: detecting a touch operation instruction triggered on the touch screen (101); and then determining a type of the touch operation instruction (102); if the type of the touch operation instruction is a stylus-triggered instruction, performing a corresponding processing according to the acquired trajectory of stylus (103), and if the type of the touch operation instruction is a gesture-triggered instruction, performing a corresponding processing according to the acquired trajectory of gesture (104).