Abstract: In order to solve the problems of low precision and low efficiency in the measurement method of cageway spacing, we design a fixed vertical shaft cageway spacing measuring instrument. The instrument collects data from laser sensors and air pressure sensors, obtains cageway spacing and depth data through R8C/L36C single-chip microprocessor processing data, achieve remote wireless transmission of data through Narrow Band Internet of Things （ＮＢ－ＩｏＴ） technology to make users timely understand the deformation of vertical shaft cageway. The use of this instrument is conducive to the safe and stable operation of coal mine lifting equipment.