Abstract: To improve the technology of padding construction of coal storage bunkers’ bottom structure, to extend the use of inflatable rubber mandrels, and to provide a reference for such constructions, this paper summarizes the experience about padding construction using inflatable rubber mandrels based on a project of Hulusu coal preparation plant in Inner Mongolia province, and introduces the key techniques, concrete measures and matters need attention during construction detailedly. It also analyzes the economic and social benefits. The results show that this technique has a remarkable superiority and a good feasibility.