Under the background of “double carbon” goal and accelerating the construction of national unified power market system, new energy consumption and regional power market construction have become a research hotspot. Based on the trend of new energy development in China, this paper constructs a new energy consumption impact analysis model based on system dynamics. Based on the key factors affecting new energy consumption, we introduce the model of inter-regional contact line trend dispatchability to optimize the trading framework of the two-level power market, and finally put forward a two-layer optimization model of the market to promote new energy consumption. Based on the actual data, we investigate the changes of new energy consumption capacity after adopting the two-tier market optimization model. The final result is that the demand for purchased power decreases, the maximum load day decreases by 10.70%, the minimum load day decreases by 6.86%, and the new energy consumption increases from 81.79% to 95.39%, which proves that the two-tier optimization model is better than the traditional model to promote new energy consumption, and provides a reference for realizing the goal of “double carbon” and accelerating the construction of the nationwide unified power market system. It provides reference for realizing the goal of “double carbon” and accelerating the construction of national unified power market system.