Natural language processing technology plays an important role in the era of big data, provides a powerful support for data mining and information retrieval, this paper discusses the application of natural language processing technology in the big data environment, analyzes the text classification, information extraction, answer system and the application prospect of machine translation, and expounds the related technology in improving the efficiency and quality of data processing advantages, the research shows that natural language processing technology brings new opportunities for big data analysis, laid a foundation for realizing more intelligent data utilization.