In the paper,a high precision RTK positioning terminal based on domestic MT32L083 is proposed.The terminal is different from network RTK single terminal design ideas,the design includes reference station and mobile station two parts,with the same circuit design,by MT32L083 master circuit,high-precision positioning module,communication module and OLED display module.The software part is developed based on the Keil platform in accordance with the modular design concept,and respectively realizes the functions of mobile station reference station configuration,differential correction data acquisition,positioning results acquisition and analysis,and OLED display.The experimental results in Beidou Innovation Laboratory show that the RTK differential positioning accuracy reaches mm level in continuous time,the terminal horizontal positioning accuracy is 3~5 mm,and the celestial positioning accuracy is 4~10 mm.The design and development of the terminal has promoted the popularization of RTK technology and the application of domestic ARM in the engineering field.