Objective To investigate the change trend of procrastination and oral health-related quality of life (OHRQoL) in older adults and to explore the predictive effect of procrastination on OHRQoL, and to provide reference for targeted intervention.Methods A convenience sample of 268 older adults from 3 communities in Qingdao City were invited to complete the General Procrastination Scale and the Oral Health Impact Scale （OHIP-14） in May 2023 （T1） and May 2024 （T2）, respectively.A cross-lagged model was constructed to explore the predictive effect of procrastination on OHRQoL.Results The total OHRQoL score at T1 and T2 was 30.81±7.05 and 34.89±10.92, respectively.The results of cross-lagged analysis showed that procrastination at T1 had a statistically significant effect on OHRQoL at T2 （β=0.286,P＜0.05）, whereas OHRQoL at T1 had no significant effect on procrastination at T2 （β=0.074,P＞0.05）.Conclusion OHRQoL decreases along with time in older adults, and procrastination can predict OHRQoL.Community health care workers should timely assess and help older adults overcome procrastination, thus to improve their OHRQoL.