Through unconfined compressive strength and scanning electron microscope tests， the effects of inorganic filler type and particle size on the strength of cement-stabilized peat were investigated. The results indicate that the strength of cement-stabilized peat initially increases and then decreases with the addition of quartz sand， reaching its peak at a 20% sand content. When the particle size of quartz sand is greater than 1.0 mm， the increase in cement-stabilized peat strength is limited， whereas it is significantly enhanced when the sand particle size is less than 0.5 mm. Kaolin particles effectively fill the voids in peat， facilitating the bonding of cement with inorganic filler and peat particles. The strength of cement-stabilized peat combined with kaolin is notably higher than that with sand. When the moisture content of peat is 600%， with an increase in kaolin content from 5% to 30%， the strength of the cement-stabilized peat at 28 days of curing period shows an increase ranging from 58.5% to 116.6%.