For understanding development tendency of small and medium-sized rigs in future, research on main driving ways of rig. Describe change of rig driving ways, analyze and compare driving way features from function allocation, structure complexity, deriving efficiency, technical performance, reliability and cost, give suggestion for small and medium-sized rigs development and management. The result shows that: electric driving rig technology is more advance and its application is wide. The hydraulic drive rig also has good prospect. The research can provide new product research and development and oilfield equipment management with theory guidance.