The marine gravity anomaly was inferred by inverse Vening-Meinesz formula from the Multi-source and multi-generational satellite altimetry data in the paper.Moreover,the marine gravity anomaly was checked by internal and external methods,which showed that the accuracy of the marine gravity anomaly was ±7.116 mgal when compared with EGM2008,and ±7.417 mgal when compared with the ship,which was consistent with the results of international study by the same checked method.