Under the influence of the development of mobile Internet, the core business of telecom operators has gradually developed from traditional voice service to mobile data service. Under this background, the connection between Internet enterprises and mobile communication services is getting closer and closer. Telecom operators are facing the "pipeline" of the impact, based on this, for telecom operators, the current most important task is to enhance product quality and customer experience level, to meet the various needs of telecommunications customers to expand the scope of users, To avoid the loss of old customers. And the realization of these goals need to support large data technology applications. The article will study the customer segmentation model based on large data and the accurate marketing strategy.