Abstract: At present, the risk assessment of urban waterlogging disasters generally uses extreme precipitation as an indicator, which often leads to underestimation of the risk degree of urban waterlogging disasters. Moderate or weak precipitation may also be one of the disaster-causing factors of urban waterlogging disasters. In order to accurately assess the risk of urban waterlogging disasters, taking Nanguan District of Changchun City as the object, based on the analysis of daily rainfall intensity distribution from 1985 to 2015, the daily rainfall intensity was converted into a precipitation exceedence probability (PEP) index. The rainfall intensity was compared with the precipitation exceedence probability based on annual maximum daily rainfall to obtain the probability of urban waterlogging disasters, finally the urban waterlogging disaster risk assessment index was constructed to evaluate the waterlogging disaster risk in Nanguan District in 2019. The results showed that the waterlogging disaster risk assessment index in the study area was 0.597 in 2019, which was a significant risk among the major risks. The research results can provide new ideas for accurately assessing urban waterlogging disaster risks, and can also provide decision-making basis for urban waterlogging disaster prevention.