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In order to solve the problems of data loss and damage in data transmission process of traditional encrypted transmission data monitoring system, a large database encryption transmission data intelligent monitoring system is proposed and designed. The whole frame structure system is given, the hardware part is mainly composed of four parts, the user login module mainly to access role division, generating the corresponding identity permissions; key management module for the protection and storage of information rights; secure file transfer module for data security transmission system; the software part of the double split 64bit data Luke decryption, complete large database encryption intelligent monitoring system data transmission design. Experimental results show that the system has low data loss rate and less data damage, effectively improves the security of data transmission, and fully meets the design requirements of encrypted transmission data monitoring system.