The ability to solve inventive problems is the core of the innovation process. TRIZ have shown results that inventiveness can be understood and developed systematically. Considering the deviation accident of belt conveyor is frequently taken place, so this paper presents a strategy based on TRIZ principles to inventive design of tensioning device for enhancing deviation problem solving for belt conveyor. The useful and potential solutions are induced by using TRIZ principles. The results show that TRIZ is a useful tool which helps in solving problems by eliminating contradictions.