Objective To investigate the correlation between self-perceived aging and frailty in the elderly patients with multimorbidities to provide a theoretical basis for clinical intervention. Methods This study enrolled 401 elderly patients with multimorbidity in 3 communities of Shihezi City, who were selected by the convenience sampling. The simplified self-perceived aging scale (B-APQ) and the frailty screening scale (The FRAIL Scale) were used for questionnaire surveys. SPSS statistics 20.0 was used for data analysis, and Spearman correlation analysis was performed on the total scores and scores of each dimension of the self-perceived aging scale and the frailty scale. Results The self-perceived aging score in the elderly patients with multimorbidities were (49.73±7.50); the prevalence of frailty was 21.70% (87/401) and pre-frailty 53.12% (213/401). Spearman correlation analysis showed that the total score of self-perceived aging was significantly positively correlated with the total score of frailty (r=0.568, P<0.05). Conclusion The self-perceived aging of elderly patients with multimorbidities in the community is at a low level and needs to be improved. At the same time, the incidence of frailty is higher in the elderly patients with multimorbidities. Therefore, community medical staff should adopt effective interventions to reduce their negative self-perception of aging to reduce the incidence of frailty in those patients.