The data of asthmatic children in the Maternity and Child Health Care Hospital of Inner Mongolia Autonomous Region and meteorological elements from 2020 to 2022 and the distributed lag nonlinear model (DLNM) are used to explore the influence of meteorological elements on outpatient and emergency visits of asthmatic children in Hohhot during 2020－2022. The results show that the average monthly number of visits of asthmatic children in the Maternity and Child Health Care Hospital of Inner Mongolia Autonomous Region was 36.17 from 2020 to 2022, and the visits of children with asthma in three years occurred roughly in three peak periods, from December to next January, May to June and August to September, respectively. The Pearson relation analysis reveals that the number of monthly visits of asthmatic children to the hospital was positively associated with temperature and precipitation. The DLNM shows a hazard effect of precipitation on increased clinic visits of asthmatic children, reaching a maximum at the lag order 1, that is, the number of asthmatic children in outpatient and emergency department increases with the increased temperature and precipitation. Precipitation has the risk of lagging outpatient and emergency visits for children with asthma.