The local variable weight vector is studied． Firstly，the definition of the improvement to local variable weight vector is proposed; the state weight vector and local equilibrium function of this variable weight are also discussed． Secondly，it is proved that the conjugate vectors (functions) possess the corresponding properties，and then the degree of variable weight synthesis is defined． Finally，the local variable weight vector is applied to the credit evaluation model for enterprise quality，and the results show that the proposed theory is effective and reasonable．