Abstract: Based on the continuation property of the Earth’s gravity field，the Coons curved surface modeling of computer graphics was introduced into the reconstruction of the marine gravity anomalies map for navigation, and both the bilinear Coons curved surface gravity anomaly model and bi-cubic C1Coons curved surface gravity anomaly model for different boundary curves were established. Through the analysis of data within experimental area, it was showed that the accuracy of gravity anomaly model based on Coons curved surface is better than that based on bilinear interpolation model, and furthermore, the more boundary conditions, the better the model accuracy would be. With the global SRTM30plus oceanic depth data, the reconstruction of gravity anomaly map based on Coons curved surface using Bouger anomaly was made, and the accuracy was improved by 25% compared with the direct modeling using free air gravity anomalies.