Objective To explore the influencing factors of self-management obstacles in home-dwelling in patients with peritoneal dialysis-associated peritonitis (PDAP), and to provide a basis for improving self-management level in home-dwelling of peritoneal dialysis patients and reducing the incidence of PDAP. Methods A descriptive phenomenological research method was used to conduct semi-structured interviews with 14 PDAP patients who were admitted to the department of nephrology of Shenzhen traditional chinese medicine hospital from May 2024 to September 2024. Directed content analysis was used to dissect and refine themes. Results Based on the theory of planned behavior (TPB), a total of 3 categories and 7 themes were extracted: behavioral attitude(cognitivedeviation, negativeemotion), subjective norms (limited family support, the impact of peers′ unhealthy habits), perceptual behavior control(multi-disease coexistence state, lack of self-care ability, heavy economic burden). Conclusion The maintenance of home self-management behavior of PDAP patientsis affected by manyfactors. Medical staff should formulate personalized management plan according to different patients to improve their home-dwelling self-management ability, so as to reduce the incidence of PADP.