The invention relates to a mobile network security encryption method based on near field communication. Near-field communication is established with intelligent equipment through a mobile terminal; the mobile terminal initiates a connection request with a mobile network server and obtains a dynamic authorization code; the intelligent equipment forwards the encrypted equipment parameters to the mobile network server; through double verification, the intelligent device is accessed to the mobile network, and the transmission security of the intelligent data in the mobile network is realized through an encryption mode. According to the security encryption method disclosed by the invention, the intelligent equipment can conveniently and quickly join the mobile network; and meanwhile, high efficiency and safety of data transmission are ensured, a user does not need to perform complicated operation in an access process, and an access mode is transparent, so that personal information privacy and data transmission safety of the user are ensured, intelligent equipment and mobile terminal hardware are protected, and malicious attacks are effectively prevented.