Big data is an important tool for scientific decision-making and a means of predicting the future with high accuracy. Data is a tool for recording human behavior. Making predictions and references to the future by big data technology is the result of human development. However, interpersonal communication and Communication should not be abandoned because of big data technology, but rely too much on the prediction and reasoning of big data, and abandon the process of interpersonal communication, which will inevitably lead to the weakening of interpersonal communication, which will affect people's free will. The text is intended to emphasize:. ['Big data is an important tool for scientific decision-making.', 'Big data will play an increasingly important role.', 'Big data should not weaken interpersonal communication.', "Big data affects people's free will."]