Clarifying the connotation of the "new norm" as the breakthrough point, based on the dependence of foreign trade, export dependency, import dependency and foreign dependency perspective under the "new norm" , this paper measures opening-up degree of Liaoning coastal economic belt, comparing with Shenyang economic zone which is the experimental zone for the country's regional economic development strategy as well. The outcomes provides fresh and objective analysis and experienced data support for the precise alignment positioning and clear development ideas in the process of opening to the outside world in coastal economic belt in the future.