The invention discloses a sludge raw material drying method applied to a cement kiln gasification furnace. The sludge raw material drying method applied to the cement kiln gasification furnace comprises the following steps: (1) receiving dewatered sludge, adding quick lime into the dewatered sludge, wherein the weight of the quick lime is 8-13% of the weight of the dewatered sludge; stirring and uniformly mixing the quick lime with the dewatered sludge to generate a first mixed material; (2) adding coal powder into the first mixed material generated in the step (1), wherein the weight ratio of the coal powder to the first mixed material is (1.8-2.5) to 1; stirring and uniformly mixing the coal powder and the first mixed material to generate a second mixed material; and (3) prilling and air drying the second mixed material prepared in the step (2). By utilizing the sludge raw material drying method, the content of water in the dried sludge is greatly reduced until the content of the water is smaller than 10%; the requirements of the cement kiln gasification furnace can be met.