In the era of digital economy, big data has become a strategic resource, and big data application capabilities have also become a strategic capability, which can effectively assist SMEs in precision marketing, enhancing corporate competitiveness, and achieving quality and efficiency improvements. However, the application of big data for SMEs is facing a series of difficulties such as insufficient understanding and lack of big data thinking, not enough investment and incomplete big data infrastructure, irregular management and low quality of basic big data, incomplete introduction and lack of big data talents. For this reason, it is necessary to raise awareness and establish big data thinking, increase investment and improve big data infrastructure, standardize management and improve the quality of basic big data, and pay equal attention to talent introduction and education, and strengthen the construction of big data talents.