Abstract: In order to solve the optimization problem of combined mining of adjacent open-pit mines, the optimal allocation and comprehensive utilization of resources, production, space, time and equipment as the goal, the basic concepts and the applicable conditions of the adjacent open-pit mine non-pillar mining technology, points out the key technology the implementation of this technology need to be solved and the solutions. Taking Heidaigou and Haerwusu open-pit mine as a case study, analyzes the synergistic effect of implementation of non-pillar mining technology in these mines. The results show that: the Heidaigou and Haerwusu open-pit mine implementation of non-pillar mining technology in 2018 ~ 2027 years, can create 2026737(NPV) thousand yuan of direct economic benefits for the two mine.