Carbonate reservoir in Sichuan Basin is one of the main Marine reservoirs in China. Through the analysis of sedimentary background and the occurrence of strata and output form of carbonate siliceous rocks in Sichuan basin, this paper found that the siliceous rocks widespread in carbonate rocks in forms of each layer, blended product, filling, metasomatism, etc. The occurrence forms and sedimentary background of siliceous rocks are different. The study of the origin of siliceous rocks is helpful to distinguish the sedimentary palaeoenvironment from the diagenetic environment. The genetic types of siliceous rocks include biological or biochemical genesis, chemical deposition, metasomatism (silicification) genesis, etc. Petrology and geochemistry methods are usually used to study the genesis of siliceous rocks, among which the study of silicon and oxygen isotopes is of great significance to deepen the understanding of the genesis of siliceous rocks. <摘要译文>