Abstract: Objective: To explore the cross-lag effect of perceived stress and depression in armed police recruits. Methods: A cluster sampling method was used to select 1,050 recruits from a certain unit of the armed police, and the Perceived Stress Scale (PPS) and Depression Self-Rating Scale (SDS) were used for interviews and evaluation. Results: (1) There were significant differences in psychological capital and psychological adaptation before and after testing; (2) Perceived pressure before and after testing was significantly positively correlated with the total score of depression; (3) The results of cross-lag analysis showed that perceptual pressure before and after testing can be positive Significantly predict post-test depression, and pre-test depression can positively predict post-test perceived pressure. Conclusion: Perceived pressure and depression of armed police recruits present a positive mutual predictive effect.