Abstract: Targeting the passenger flow queuing situation in front of outbound gate unit at urban rail transit station during the distribution process of passenger flow, based on the true node model of gate unit, a basic area and 8 types of limit areas are divided, and the limit area where 2 sets of staircase-escalator correspond to 1 set of outbound gate units is divided. The passenger flow gathering and distributing process after arriving at the exit of outbound gate unit is expounded. Based on the time discretization for iterative calculation, the analysis method of passenger flow queuing in front of outbound gate unit is proposed. Two working conditions of simultaneous non simultaneous arrivals of passenger flow are designed. The wide applicability and practicability of the analysis method are verified by calculation examples.