Abstract: This paper investigated the influence of phase space embedding parameters，which are embedding dimension，time delay and threshold，on the recurrence analysis based on the classical Lorenz chaotic equation and Logistic mapping.The study results showed that the recurrence analysis was not significantly dependent on the embedding parameters，and the variations of embedding dimension and time delay only led to changes of recurrence rate and did not change the texture of recurrence plot.In the same way，the threshold could directly affect the amount of recurrence points and did not change the texture of recurrence plot.Finally the recurrence analysis method was used to characterize flow patterns of gas-liquid two-phase flow in a vertical upward pipe，the characterization result showed that the recurrence plot could well reflect the evolution characteristics of flow pattern，and the recurrence characteristics quantities were sensitive to the variations of superficial gas velocity and provided the useful characteristics mining quantities for flow pattern identification of gas/liquid two-phase flow.