Abstract: In view of the current situation of measurement system for mine spatial information，such as complicated operation，low efficiency，poor portability，poor integration，a new simple，efficient，hand-held measurement instrument of mine spatial information integration was developed.The instrument can calculate the distance by adopting the phase method and acquire the three-dimensional coordinate data by combining with the dip and the azimuth. The hardware system of the instrument was developed，with the functions of independent power supply，storage of measurement data，wireless communications and others so as to realize the three-dimensional handheld measurement. The measurement software of the instrument was improved，with the functions of communication interface and measured parameters configuration，real-time display of the survey coordinate，entity modeling and three-dimensional display of the space objects，and analysis and evaluation of the models. When tested in underground mine，the measurement instrument can quickly obtain three-dimensional coordinates of the unknown underground areas and realize the maximum measuring range of the instrument at 83 m and maximum measuring error of the instrument at 1cm with the characteristics of simplicity，high efficiency and portability. Its effectiveness and reliability can meet the requirements of the measurement of mine spatial information integration.

Key words: Mine surveying, Three-dimensional coordinate, Three-dimensional reconstruction