Aiming at improving the detecting frequency and sensitivity

mountain-climb searching algorithm was used in projective capacitive touch-screen for the capacitance mea-suring of the sensor-electrodes. With the control of computer programs and some detecting circuits

the ordinary mountain-climb searching algorithm and the optimized one were rea-lized on a precise projective capacitive touch-screen. The analysis of the program running process indicates that

with the mountain-climb searching algorithm

the detecting frequency of a precise projective capacitive touch-screen can be improved for at less several times compared with the tradition detecting methods. Except this

the optimized mountain-climb searching algorithm can also improved the anti local disturb capability of the touch-screen. Test of sensitivity by line-drawing methods also indicates that the mountain-climb searching algorithm can effectively improve the detecting sensitivity of projective capacitive touch-screen.