Big data long-distance secure transmission system for agricultural internet of things

The invention discloses a transmission communication manner of an agricultural internet of things system, and provides big data long-distance secure transmission for communication of the agriculturalinternet of things system. The technical solutions adopted by the invention to solve the technical problems are as follows: in the agricultural internet of things system, performing big data processing on data by using a high-speed broadband Ethernet chip, then performing encryption and replacement on data in a data caching module by using a data encryption chip and then sending the data to an antenna directionally via a radio-frequency chip by using a long-distance microwave; and similarly, after a receiving terminal receives a signal and the signal passes through a radio-frequency receivingantenna and a radio-frequency module chip, decrypting the signal by using a decryption module and transmitting the signal to a terminal to perform data processing. Through a relay station, super long-distance encrypted transmi