MJO (Madden Julian Oscillation)-based southwestern region precipitation prediction method

The present invention discloses an MJO (Madden Julian Oscillation)-based southwestern region precipitation prediction method. The MJO (Madden Julian Oscillation)-based southwestern region precipitation prediction method includes the following steps that: a, the climate data of China' southwestern region over the years are extracted, and tropical MJO activity characteristics over the years are used in combination, so that the precipitation characteristics of China' southwest region are classified, and a tropical MJO-based precipitation model can be established; b, based on ORL, 850hPa, 200hPa wind field variables, the phases of tropical MJO activities are calculated and predicted, and the intensity of the tropical MJO activities is calculated and determined; c, the characteristics of tropical convection activities are analyzed, and the actual conditions and evolution trends of specific weather data are used in combination, so that weather diagnostic analysis can be carried out; and d, based on the characterist