Abstract: “5.12” Wenchuan earthquake brings the worst-hit area great damages on ecological carrying capacity. In this paper, we select phosphorus chemical industry in Deyang City as the research object. We sum up its pre-earthquake patterns of industrial development, system defects, as well as the impact of the earthquake by many field researches and secondary data. We explore the link between mechanisms of post-disaster developing industrial carrying capacity and their basic. We build a path model of post-disaster developing industrial carrying capacity and establish the inherent relationship between basic elements and mechanism of post-disaster developing industrial carrying capacity by referring Porter’s “diamond model”.