With the advent of the era of big data and cloud computing, big data is more and more widely used in various industries, and the research and practice of using big data technology to realize blaze new trails and start an undertaking cultivate mode in computer special field of study will become an important focus of the blaze new trails and start an undertaking cultivate system nowadays. In this paper, we construct the blaze new trails and start an undertaking cultivate model based on BP ANN, construct the blaze new trails and start an undertaking cultivate evaluation index system through Delphi method, and finally design the model of blaze new trails and start an undertaking cultivate evaluation in order to analyze the results of blaze new trails and start an undertaking cultivate. The scoring results correspond to the data of 21 evaluation indexes of a student, and the various scores can map to the level of individual students’ blaze new trails and start an undertaking ability, and provide effective countermeasures for computer special field of study students’ blaze new trails and start an undertaking cultivate. This paper effectively evaluates the blaze new trails and start an undertaking ability of students, broadens the application value and research field of BP ANN, and actively explores the blaze new trails and start an undertaking cultivate of computer special field of study students, which helps the operation mode of blaze new trails and start an undertaking cultivate of computer special field of study special field of study, provides step foreward ideas, and is of great significance to promote the step forward of blaze new trails and start an undertaking cultivate mode.