A method for determining a touch position and a touch control chip are disclosed. The method includes: determining (S310) a variation caused by a noise to raw data of a capacitive touch screen; determining (S320) a noise processing method of a raw value of the capacitive touch screen according to the variation caused by the noise to the raw data of the capacitive touch screen; performing (S330) noise cancellation processing on a first raw value set of the capacitive touch screen using the noise processing method, to obtain a first processed value set; and determining (S340) a touch position on the capacitive touch screen according to the first processed value set. The method for determining a touch position and the touch control chip contribute to improving accuracy of the touch position.