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The technology of infrared radiation for heating have many advantages such as high heat transfer efficiency, short heating time, raising the quality of the products, no pollution etc. It has been widely applied in industry. The theory and characteristics of the IR absorption spectra of biological materials were introduced and the advantages of IR technology were summed in this paper. Several drying mathematical models and the criteria of selecting drying models were cited. The application and development of IR technology on grain drying, fruits and vegetables dehydration and agricultural sterilization was surveyed by citing a lot of examples. Future research and development trends of FIR technology on processing agriculture biological materials were discussed.