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The importance of the grade of coal used for coal briquetting can be assessed by the experimental work of Zhengzhou E.P Machinery Co., Ltd. Bituminous coal fines from three different fields were used for our studies. The results showed that the type of coal affects the compressive strength and water resistance of coal briquettes. The quantity of mineral matter present in different amounts in various types of coal is the cause of this behavior. To be exact, the difference in the surface and bulk composition of the coal briquettes causes the deposition of large mineral content at some points and the formation of microscopic pores in the whole structure. Some other factors like refining, mining process and the physical properties of the coal also create minute spaces in coal. The deposition of mineral matter and pores weakens the structure of briquettes and the resulting briquettes break under stress.