Suspended fertilizer is an important raw material in the application of water and fertilizer integration technology. Its high concentration and flexible and adjustable formulation show great potential in modern agricultural development.However，the characteristics of high nutrient composition also lead to the crystallization，stratification，sedimentation and other instability problems in the process ofstorage，transportation and applicationprocess，which restricts the developmentand application of suspended fertilizer to a greater extent. Themechanism，selection of auxiliaries and process optimization of suspension fertilizer stability were reviewed in this paper. The instability mechanism was mainly proposed from the aspectsof Austenitic ripening，Van der Waals’force and gravitational effects. The factors affecting stability included the particlesize of suspended particles and the viscosity of the suspension system，electrostaticrepulsion，sterichindrance，solvationand so on. Suspension of fertilizer system composition wascomplex，the optimization of system stability needed to beeffectively linked with the mechanism ofresearch，the future stability of suspension of fertilizer research should be effectivelyguided by the mechanism of research，targeted additives and the improved process in order to find an effective way. This review could provide theoretical basis and method for the optimization of storage process of suspension fertilizer production.