The construction data of building electrical engineering is an indispensable part of the project excellence creation, and its importance is beyond doubt. The construction data of building electrical engineering is the data formed by the construction unit during the construction process, including the whole building from the beginning to the end of the construction, and is an important document of the whole construction process. Therefore, the construction data must be prepared in strict accordance with the specifications to actually reflect the technology and quality of the construction site. Mastering the key points of creating excellence in engineering construction data is helpful to creating excellence in engineering. This paper analyzes and records the key points of creating excellence on construction data from three aspects: construction material data regulation, construction record regulation and construction test data regulation, so as to improve the level of construction quality.