The optimal allocation of SNOP considering operation efficiency and investment of distribution network is a multiobjective problem. In this paper, a multiattribute utility mergence method is proposed. Firstly, mergence rules are identified to achieve the aggregate utility according to the internal characteristic and logic relation of optimization indexes. Then, a SNOP allocation optimization model is built with the max aggregate utility value as the object. Finally, a case study of IEEE 33bus system is included to verify the effectiveness of the proposed model and method. It is shown that the multiattribute utility method for SNOP allocation can decrease active power losses, improve the system voltage level and load balancing level and increase the distributed generation penetration with a reasonable SNOP capacity.