Abstract: The component and content of carbonaceous material(CM)in aggregatemay strongly influence thestrength of concrete.However, most previous researches only providerough estimates or qualitative results on the content of CM,while constraints on the spatial distribution and the graphitization degree of the CM are generally lacking.In this paper, we analyzed the distribution and graphitization degree of CM in carbonate aggregate of the quarry in Wudognde Hydropower Station through field reconnaissance, petrographic observation under micoscope andlaser Raman analysis, and discussed thecause of formation of the CM.Furthermore, the total organic carbon(TOC)quantitative detection method was applied to the determination of the carbon content of raw rock, aggregate and concrete.Through the comparison of the test results from different types of instruments, it was found that this method had the characteristics of low detection limit and high precision, which could be applied to the detection of aggregate samples with low organic carbon content, making up for the shortcomings of traditional qualitative detection methods.The results also showed that Raman spectroscopy can quickly obtain accurate information of the graphitization degree of the CM,and TOC analysis technology can accurately determine the content of the CM.The organic combination of this two methods can provide unique information about the occurrence, cause of formation and evolution history of carbon materials in aggregates, and provide important scientific data for the experimental study of the influence of carbon materials in aggregates on concrete performance.