The deregulation of power retail market has a great impact on the management of power quality. Different types of power selling companies have participated in the market and intensified the management dilemma of power quality. Firstly, the impact of the deregulation of electricity retail market on power quality management is analyzed. The differences of power quality management between domestic and foreign power enterprises are comparatively analyzed. Then, suggestions are proposed for power quality management in the deregulation of electricity retail market from the aspect of index management, development trend of power selling business and price management, so as to manage power quality in the power market environment, which can be the reference to the development of power market in China.