Climate change impact remains a threat to Cereal in Africa. Although injecting sulfur into stratosphere may reduce increasing temperature from global warming, its impact on the ozone layer remains a concern. As a result, the use of other materials; alumina (G6alumina), calcite (G6calcite), diamond (G6diamond) and sulfur (G6sulfur) has been put forward. Our study examines how these materials may affect major cereals (maize, pearl millet, sorghum and Rice) in Africa under SSP2-4.5 and SSP5-8.5 scenarios. Our result show all the materials may reduce increasing temperature due to global warming by 2^oC while rainfall may increase by 10mm in the Sahel (SAH) but reduce by 20mm in Central Africa (CAF). The impact of G6alumina may increase suitable areas for maize and sorghum in CAF, West Africa (WAF) and Madagascar (MDG) and G6sulfur over the SAH and Northeast Africa (NEAF) region relative to SSP2-4.5 and SSP5-8.5 by the end of century. G6calcite may increase suitable areas for pearl millet by 3-8% in CAF, WAF and MDG regions and G6alumina in SAH and NEAF. G6sulfur may increase Rice suitable areas (4-10%) across the region except WAF with G6alumina. The study will improve our understanding on cereal response to different geoengineering materials in Africa.