In order to study the problem of safety marking setting in railway stations, this paper analyzes the factors directly related to the setting of safety markings, establishes a theoretical model based on Bernoulli effect, carries out the analysis of the interval planning of safety marking setting by debugging the parameter range in the model, and analyzes the sensitivity of the controllable parameter factors of the railway department. Reasonable control of the speed of the train into the station, reasonable setting of the platform hardware environment and other related suggestions.