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The application relates to the field of cement, and particularly discloses an environment-friendly cement based on carbonaceous coal gangue and a manufacturing method thereof. The environment-friendly cement based on carbonaceous coal gangue raw materials comprise modified coal gangue powder 60-80 parts; cement clinker 30-40 parts; slag powder 10-20 parts; desulfurization gypsum 10-15 parts; tourmaline powder 5-10 parts; ammonium sulfate micro powder 5-10 parts; sodium carboxymethyl cellulose 3-7 parts; and the modified coal gangue powder is obtained by calcining and activating coal gangue powder and then treating the coal gangue powder with a beta-alanine aqueous solution. The environment-friendly cement disclosed by the application takes coal gangue as one of main raw materials, converts the coal gangue into environment-friendly cement with high added value through activation and enhancement treatment. This not only reduces the dependence on natural resources, but also realizes the recycling of waste resources and improves the resource utilization rate; and the cement disclosed by the application can maintain good working performance in the construction process.