of mature SMEs includes scale expansion strategy and stable investment strategy. Scale expansion mainly refers to the expansion of the sales scale of core products. Expansion The investment strategy is the monly used investment strategy for small and medium-sized enterprises during the mature period. It is the most direct and effective way for SMEs to achieve rapid growth. The methods for achieving scale expansion mainly include market ration, development strategy and product development strategy. After entering the mature stage, small and medium-sized enterprises will have a stronger desire to grow and their internal lack of contradictions in terms of various conditions and capabilities. Therefore, they should adopt a more stable attitude in financial management and avoid blind expansion.