Abstract: With the increasing amount of dynamic characteristic recorder data, the identifying time will increase by using of multiple curves identifying method, while the integration of all load characteristics records by integrated method only requires identifying added records of load characteristics. Three equivalence methods of integrating load characteristics, such as static load, impedance and admittance of motor are analyzed at first. Loads are divided to static and dynamic loads, which are equivalent separately. Then, five kinds of weights are compared, i.e. steady state power, improved steady state power, sensitivity, slip ratio and load rate considered if weights selecting of parameters that are sensitive to slip ratio, and composite weight. In addition, the parameters are integrated by five kinds of weights proposed in this paper, and composite load model is obtained. Case study verifies that the composite load model can be constituted effectively and rapidly by integrated weighting method, which has strong generalized capability.