The current development status of the mobile terminal for personnel position and the mainstream technologies applicable to the mobile terminal for personnel position are studied.Aiming at the problems faced by the existing mobile position terminals in power consumption and position accuracy,a mobile position terminal with differential position function is proposed,which integrates WIoTa and 5G communication.Based on the analysis of the principle of differential positioning,a method of integrating WIoTa AP with positioning reference station is proposed,which eliminates the dependence of differential positioning on additional radio or mobile network,realizes the transmission of regional differential data based on WIoTa communication,and realizes the positioning information on the cloud by 5G.This paper realizes the positioning system based on UCM202,UM626N and RG200U chips,and sets up a test environment for field testing.The test results show that the system can reach centimeter-level positioning accuracy in open environment and decimeter level positioning accuracy in indoor window.At the same time,the system has smaller volume and lower power consumption.