The fourth industrial revolution centered in data is coming. It is crucial and inevitable for every business decision-maker to consider the relationship between big data and industrial transformation. Firstly，this article introduces the concept and value of digital transformation. Then，the challenges big data bringing to traditional industry are summarized from such aspects as the conceptions of employees and organizational structure. Some strategies of digital transformation are discussed as well. Finally，we make a projection into the trend of digital transformation. According to analysis，we conclude that the digital transformation of a traditional company represents an irresistible trend. To seize opportunities，a traditional company need to establish the concepts，rules，organizations and process of digital transformation，exploit internal digital resources and pay attention to cultivating talents in digital transformation.