With the increasing demand for exploration of complex formations and thin layers, electric imaging logging technology has become an important logging technique in the field of petroleum exploration due to its capability to provide high-resolution formation structural information. However, as ultra-deep wells continue to be drilled, the high-temperature and complex downhole environment pose new challenges to the stability and reliability of electric imaging instruments. To meet the logging requirements of ultra-deep wells, this paper first provides a detailed introduction to the design structure and performance indicators of the instrument. Subsequently, the circuit structure and working principle are elaborated upon, followed by a demonstration of the instrument's performance in laboratory testing and field applications. The results of high-temperature laboratory tests confirm the stable operation of the instrument at 200 °C, and feedback from field applications indicates its effective deployment in the Xinjiang region. This article serves to address the evolving challenges in ultra-deep well logging, offering insights into the design, functionality, and practical performance of a high-temperature electric imaging logging instrument.