The effects of different ratios of alunite (gypsum) to zeolite on flexural strength, compressive strength, and fluidity with a proportion of 40% are investigated, and the influence mechanism of alunite(gypsum)-zeolite system as a mixture on cement hydration is explained. The results show that the optimal ratio of alunite to gypsum is 2:1, and the mechanical properties of alunite as a mixture are the best at this ratio. The smaller the proportion of zeolite, the lower the strength of the hardened cement at the same age. At the age of 28-day, the compressive strength is 47.03MPa when the zeolite content is 25%, which is 12.97% lower than that of blank sample. When the zeolite content is 35%, the 28-day compressive strength can still reach 46.61MPa, which is 11.90% lower than that of the blank. The fluidity has a linear relationship with the zeolite content. The higher the zeolite content, the worse the fluidity. Based on the mechanical properties and fluidity, the optimal ratio of alunite (gypsum) to zeolite with a proportion of 40% is determined to be 10(5):25. The more zeolite, the higher the reaction activity of the system. The more hydration products at the same age, the faster the reaction and the higher the strength.