Abstract: A modified correction model, has takes into account of the effect of two horizontal acceleration components of Coriolis force and disturbing gravitational attraction, aiming at platform tilt in air-sea-borne gravimetry is proposed for the approximation of existing models. The reasonableness of using modified model is analyzed and demonstrated theoretically. The amount of influence due to the approximation of existing models is estimated by using numerical calculations. And a practical airborne gravimetry data set is used as a case study to test the efficiency of the proposed model. These works provide a reliable theoretical support to improve the existing models of data processing, uniform operation standards and for the next revision of existing rules for operations of airborne gravimetry.