Based on the daily observation data of 66 weather stations in Fujian Province from 1960 to 2020, the PDO monthly index, the ENSO monthly index and the NCEP/NCAR daily reanalysis data, the multi-scale features and impact factors are discussed by using the power spectrum analysis, wavelet decomposition, correlation and composition analysis. The results reveal: (1) there were 114 persistent cold events during 1961 to 2020. These events occurred frequently with stronger mean intensity before the mid 80’s of 20st century, however, decreased significantly with weaker mean intensity after that period. The prevalent duration was 5~11 days even up to 40 days. (2) the winter cold index exists significant 10-20-day and 30-60-day low frequency periods also 2-8 years in interannual scale. (3) the persistent cold events in winter are closely related to the ENSO events, the atmospheric intraseasonal oscillations and the cold air activities. PDO and ENSO in the negative phases were favorable for the occurrence and duration of persistent cold events. When the tropical convection prevailed in the maritime continent and the western Pacific Ocean, the persistent cold event occurred frequently. Furthermore, the cold northerly airflow guided by the strong Siberian High could reach the southern region of South China, that triggered the persistent cold event in Fujian province.（4）By comparing the persistent cold events with different durations, the “short”, “medium”and “long”events are characterized by the west, east and middle cold air paths, respectively.