Abstract: In order to ensure the safety of visually impaired and blind passengers (hereinafter referred to as ′the blind passengers′) walking in the metro station, based on their position-ing needs of the blind passengers in the metro station, UWB (ultra-wideband) technology is selected after comparing various positioning technologies, and the positioning scheme for the blind passengers in metro station based on UWB technology is studied. The advantages and disadvantages of various positioning algorithms of UWB technology are compared, and TW-TOF (two-way time-of-flight ranging) method and TDOA (time difference of arrival) method are used as positioning algorithms of UWB technology. On this basis, the base station spacing test and signal refresh frequency test are carried out. The test results show that the base station layout of the minimum positioning unit should keep 12 m transverse spacing and 10 m longitudinal spacing under the condition of ensuring 0.5 m positioning accuracy. It is appropriate to set the signal refresh frequency as 1 Hz.