Abstract: A syncretized weight allocation method was proposed to overcome the limitations of two weight allocation methods of multiattribute decision-making without decision attribute,i. e., the impersonal method and the subjective method. To obtain the optimal weight integration between subjectiveweights and objective oneswith thismethod, amathematicalplanningmodelwas setup and the genetic algorithm was used to gain the global optimal solution. As a resul,t subjective factors in weigh syncretizing can be avoidedwith thismethod. At las,t an instancewas given out.