“In the field of peat soil foundation treatment, this study introduces its research progress. The experiment mixed ultrafine cement (UFC) into ordinary cement to form a composite solidify agent, which significantly improves the unconfined compressive strength (UCS) of cement-soil. UFC can mitigate the adverse effect of Humic Acid (HA) on cement-soil and promote the enhancement effect of Fulvic Acid (FA) on cement-soil UCS, laying a foundation for the construction of peat soil foundation treatment system.”