Abstract: Non-R&D innovation is critical for SMEs to implement innovation activities. As such, clearing the typical models of non-R&D innovation in SMEs can help enrich innovation theory and guide innovative practice. Based on grounded theory, we built a structural model involving the typical models of non-R&D innovation in SMEs. This model covers two sub-models: RPI model directed technology and MOS model directed non-technology. In particular, RPI model includes three main categories: reverse innovation, technology purchase, and gradual improvement. MOS model also includes three main categories: market innovation, organizational innovation, and system innovation. Moreover, this study explored the influencing paths of main categories in RPI model and MOS model, respectively.