Precision measurement technology has always been the core technology in the fields of biomedical impedance analysis, electrochemistry, power transmission, radio frequency antenna analysis and many other analytical instruments.In modern precision measuring instruments, the number of resistance-capacitance is often hundreds of thousands, and the impedance parameters are very strict, the quality of the resistance-capacitance used and the stability of its own impedance value is an important factor affecting the performance of electronic systems, so the precision resistance-capacitance measurement has become an important part of the design of many electronic systems.Under this background, a high precision resistance-capacitance analyzer based on hardware orthogonal phase-locked structure is proposed in this paper.The design takes hardware orthogonal phase discrimination as the core. Around this part, the orthogonal frequency generator, I-V conversion regulation module, Sallen-Key filter and other hardware structures are designed. At the same time, the MCU system is designed for module control and drive, task allocation and scheduling, and data acquisition and processing. Finally, performance tests were conducted on the key components of the system and the physical complete machine, achieving the judgment of resistance and capacitance as well as the measurement of impedance values. After the actual system test and comparison with the standard bridge test, the average value of the resistance measurement error of this system is 0.032 4%, and the average value of the capacitance measurement error is 0.054 7%. And while achieving a lower measurement error, it ensures the small volume and portability of the overall system, ultimately enabling the design to reach the expected goal.