The invention discloses an ultra-high-frequency electronic tag recognizer, which can be in long-distance wireless data communication with a passive radio frequency recognition tag operated at an ultra-high-frequency (860-960 MHz) channel. The electronic tag recognizer structure disclosed by the invention is composed of a radio frequency interface module and a base band processing module. The radio frequency interface module utilizes a zero intermediate frequency circuit structure to replace the conventional superheterodyne mixing circuit structure, and increases the reliability of the system. The base band processing module utilizes a dynamically reconfigurable analog signal processor (DSASP) as a base band signal modulation platform of the recognizer, utilizes a field programmable analog array (FPAA) as a base band signal demodulation platform of a reader-writer, simplifies a circuit design, and reduces the cost of the reader-writer. The electronic tag recognizer of the invention is simple in structure and stable in property, and can meet requirements of different application occasions from a portable type to a base station type.