A method for testing crosstalk of a screen. The method includes when a main screen and a secondary screen simultaneously display pictures of different grayscales, determining a standard parameter value of crosstalk for each of the secondary screen and the main screen caused by the other; determining an actual parameter value of crosstalk for each of the secondary screen and the main screen caused by the other; calculating a degree of crosstalk for each of the secondary screen and the main screen caused by the other, according to the standard parameter value of crosstalk and actual parameter value of crosstalk for each of the secondary screen and the main screen caused by the other, respectively.