In current, constant speed of asynchronous generator system has been used wind farm in China areas. But because of that abilities of reactive power control helpless, reactive power have been provided by grid. In view of the above situation, the feasible measures are adopted in the wind dynamic reactive power compensation devices. The asynchronous machine transient process used reactive power to keeping voltage of machine has been provided. This article introduced the Game Theory in economics to the area of reactive power compensation. This new method of the share of reactive power in wind farm, will improve wind farm reactive power compensation too vague to efficient in the moment. In the meantime, the share of reactive power algorithm analysis process have bee bullied in this paper. For the research in the future, it proposed supplementary opinions.