With the reform of the construction industry in the country, the current dry engineering is becoming more and more difficult and the competition is becoming more and more fierce. At the same time, the slowdown of China’s economic growth has also caused the construction industry’s demand to slow down sharply. Faced with the dual pressures of deteriorating demand and increasing competition, how to find a solution is a strategic issue facing construction companies. This paper takes DDL Construction Company as the research object and conducts research on its competitive strategy, in order to provide support for the construction company to gain competitive advantage in such fierce competition. Through the relevant theories of strategic management and competitive strategy, this paper analyzes in detail the internal and external development environment and resource capabilities that DDL Construction Company face, and evaluates DDL Construction Company’s development opportunities, threats, and its strengths and weaknesses. Based on this, SWOT matrix analysis and other methods are used to select suitable competitive strategies for DDL construction companies, and corresponding implementation safeguard measures are formulated.