The invention discloses a method for scanning a projective capacitive touch panel, which comprises the following steps of: (A) dividing all mutual capacitors into two groups according to resistance-capacitance constants to an integrator, and setting a first standard voltage value and a first variation difference of each group of mutual capacitors and a second standard voltage value and a second variation difference of each mutual capacitor respectively; (B) applying higher single-frequency excitation signals to the group of mutual capacitors with lower resistance-capacitance constants and applying lower single-frequency excitation signals to the group of mutual capacitors with higher resistance-capacitance constants to perform scanning so as to obtain first current voltage values of all the mutual capacitors in each group, and comparing the first current voltage values with the first standard voltage value corresponding to the group to judge suspicious mutual capacitors beyond the range of the first variation difference; and (C) applying low-frequency excitation signals to the suspicious mutual capacitors to obtain second current voltage values of the suspicious mutual capacitors,and comparing the second current voltage values with the second standard voltage value corresponding to the mutual capacitors to judge the mutual capacitors beyond the range of the second variation difference and affected by touch. The method is quick to scan and accurate to position.