Using umic acid as raw material, sulfonated humic acid type dispersant for coal-water slurry was synthesized. By orthogonal and single-elemental experiments, the best synthesis condition was obtained as follows:mass ratio of humic acid and sodium sulfite 5:4, sulfonation time 4 h, temperature 80 ℃,doasge of concentrated sulfuric acid 8 g. The sulfonated humic acid type coal water slurry dispersant synthesized under above conditions was characterized by IR and TG. The results show that the dispersant for coal-water slurry has some remarkable advantages, such as good dispersibility, high stability and low synthesis cost.%采用腐殖酸为原料合成磺化腐殖酸型水煤浆分散剂，通过正交及单因素实验，确定合成的最佳工艺条件为：腐殖酸与亚硫酸钠的质量比5：4；磺化时间4 h；温度80℃；最佳浓硫酸用量为8 g。该条件下，对磺化腐殖酸系水煤浆分散剂进行红外、热重表征，得知该分散剂具有磺化腐殖酸系水煤浆分散剂的优点：分散性好，合成成本低，稳定性高。
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