Abstract: Aiming at the long distance of railway passenger station platform, dispersed passengers and single warning sign, a railway island platform crossing alarm system was designed and implemented based on passenger transport work and combined with laser detection and remote communication technology. Compared with the traditional platform passenger take-off and landing organization, the railway island platform crossing alarm system has the characteristics of strong timeliness, full coverage and full warning and reminder. The development and trial application of the system has achieved the goal of improving passenger safety factor, solving on-site operation problems and improving the quality of passenger transport work.