The mode of employment education in colleges and universities has always been the focus of employment work in colleges and universities in China, but there are some problems in the construction of employment education mode in colleges and universities at present. Taking engineering colleges as an example, this paper explores the mode of employment education in colleges and universities under the big data of the Internet, analyzes the factors affecting its development, and puts forward solutions to the existing problems. By constructing the dual-subject education mode of "major+employment", students' training is combined with career planning. Guided by industry demand and centered on the improvement of students' ability, a set of dual-subject education system of "major+employment" and dual-subject education mode of "career planning+enterprise demand" are constructed, which combines students' personal development with career planning to achieve the purpose of improving students' employability and enhancing their professional competitiveness.