With the rapid development of economy, electrical load is increasing year by year, resulting in low voltage phenomenon in a peak time for the user side, and affecting the lives of the residents seriously. Based on the understanding of the causes of low voltage, this paper makes some analysis of the impact on the area of voltage regularity and combinations, because of using the control measures of distribution transformer on-load voltage regulation, low voltage reactive power compensation and 10kV bus voltage regulation. And establishes characterization of multiple correlation area of low voltage distribution network to adjust change process dynamic hybrid model, and then derives the sensitivity function of area voltage to each regulation variables, in order to determine different low voltage and corresponding adjustment measures to improve the combination of priorities. Taking constraints of distribution network area voltage level into account, it makes the multi-purpose function priority ranking, the function includes voltage deviation, network loss, and the minimum adjustment costs, etc. Then integrates each means of voltage regulation and makes the design of predictive control based on multipurpose constraint model area voltage control strategy with considering the constraints of safe operation and target priority.