A surface acoustic wave touch screen comprising a screen and a driver module, the screen being provided on its surface with: only one surface acoustic wave emitter made of a piezoelectric material; a first reflecting unit and a second reflecting unit; a third reflecting unit and a fourth reflecting unit; and a first receiving transducer and a second receiving transducer, wherein the first reflecting unit is configured to reflect the first surface acoustic wave signals to the second reflecting unit, the second reflecting unit is configured to reflect the first surface acoustic wave signals to the first receiving transducer, the third reflecting unit is configured to reflect the second surface acoustic wave signals to the fourth reflecting unit, the fourth reflecting unit is configured to reflect the second surface acoustic wave signals to the second receiving transducer, the first receiving transducer is configured to convert received surface acoustic wave signals into first touch electrical signals, the second receiving transducer is configured to convert received surface acoustic wave signals into second touch electrical signals, to determine a touch position according to the first touch electrical signals and the second touch electrical signals; wherein the screen is a parallelogram and the only one surface acoustic wave emitter, the first receiving transducer, and the second receiving transducer are disposed on corners of the screen, wherein the only one surface acoustic wave emitter is disposed on a first corner of the screen, characterized in that the first receiving transducer and the second receiving transducer are disposed on a second corner opposite to the first corner, the only one surface acoustic wave emitter is attached on the screen, and the only one surface acoustic wave emitter is configured for emitting first surface acoustic wave signals in a first direction and for emitting second surface acoustic wave signals in a second direction, upon being driven by periodic electrical signals provided by the driver module. only one surface acoustic wave emitter made of a piezoelectric material; a first reflecting unit and a second reflecting unit; a third reflecting unit and a fourth reflecting unit; and a first receiving transducer and a second receiving transducer, wherein the first reflecting unit is configured to reflect the first surface acoustic wave signals to the second reflecting unit, the second reflecting unit is configured to reflect the first surface acoustic wave signals to the first receiving transducer, the third reflecting unit is configured to reflect the second surface acoustic wave signals to the fourth reflecting unit, the fourth reflecting unit is configured to reflect the second surface acoustic wave signals to the second receiving transducer, the first receiving transducer is configured to convert received surface acoustic wave signals into first touch electrical signals, the second receiving transducer is configured to convert received surface acoustic wave signals into second touch electrical signals, to determine a touch position according to the first touch electrical signals and the second touch electrical signals; wherein the screen is a parallelogram and the only one surface acoustic wave emitter, the first receiving transducer, and the second receiving transducer are disposed on corners of the screen, wherein the only one surface acoustic wave emitter is disposed on a first corner of the screen, characterized in that the first receiving transducer and the second receiving transducer are disposed on a second corner opposite to the first corner, the only one surface acoustic wave emitter is attached on the screen, and the only one surface acoustic wave emitter is configured for emitting first surface acoustic wave signals in a first direction and for emitting second surface acoustic wave signals in a second direction, upon being driven by periodic electrical signals provided by the driver module.