For engineering enterprises to achieve leapfrog development, digital transformation has become an urgent task, and establishing a scientific digital evaluation model is the key to realizing this transformation. In response to the maturity evaluation issue during the digital transformation process of engineering enterprises, this paper, taking the digital transformation of engineering enterprises in China as the background and referring to the research theories of different scholars at home and abroad, constructs a framework for the digital transformation of engineering enterprises, conducts a quantitative assessment of it, and builds a digital transformation maturity assessment model centered on this. This model aims to accurately measure the progress and effectiveness of digital transformation in engineering enterprises. Through quantitative analysis, it provides insights into the connection between the whole and the part, identifies weak links, formulates improvement strategies, and promotes the enhancement of digital capabilities.