The ocean transportation of grain bulk carriers is promoted by development of ocean economic.With the development of coastal region,the cargo transportation will become more and more important,especially for the resource such as grain,oil and coal.In this study,a model is built to estimate the number of grain bulk carriers needed for wheat based upon analyzing the relationships between Tons and Ton-miles of Africa wheat transportation.We find that the agricultural policies greatly affect the wheat transportation to Africa.Then,using two scenarios,we predict how many ships are necessary for the maritime transportation of wheat from other places to Africa in the future.We believe that this research is extremely useful to maritime transportation of wheat to Africa.