Disclosed herein is a formulation of a Bacillus velezensis TCS001 suspension concentrate. The suspension concentrate has good dispersibility, a high suspension rate, and relatively strong adhesion to plant surfaces, is resistant to rain erosion, and has more significant and longer-lasting control efficacy than that of wettable powder. Applying the suspension concentrate can improve the quality of cherries and blueberries and promote the growth of strawberries. The suspension concentrate can further serve as an agent for full-growth-cycle disease control and/or quality improvement of cucumbers and tomatoes. After applying the microbial agent throughout the entire crop growth cycle, not only are diseases in facility-cultivated crops effectively controlled, with control efficacy superior to that of conventional chemical agents, but also crop quality and yield are improved compared to the chemical agent treatment group.