<p>In the process of building construction, the optimization of the construction scheme has always played a great role in saving construction costs, reducing construction risks and speeding up the construction progress. This paper studies the optimization of the implementation plan of the deep foundation pit earthwork excavation stagein the actual case, and analyzes the results of the optimization of the plan, so that the optimized new plan can accelerate the construction period and save money while ensuring the project quality and construction safety. The construction cost has played a significant role.</p>