In this experiment, clay loam, fine sand and silt loam from the farmland, floodplain and Loess platform in Changchun seperately were chosen for the matrix to study the stability and mobility of soil colloids based on physicochemical property through laboratory simulation. The study showed that the critical flocculation concentration(CFC) of the three kinds of colloids were negatively proportional to the content of illite and montmorillonite, and CFC reduced with the increase of mineral content, which might be due to illite/smectite minerals which are easy to flocculate and lead to higher hydration of the driving force and instability. De-iron colloid of farmland increased stability but for loess platform and floodplain reduce stability for different changing of property after removing the free iron cxide. After removing organic, de-organic colloids of farmland, floodplain and Loess platform reduce CFC, and the reduced degree are negatively proportional to the content of organic.