Abstract: The study on the relationship between meteorological factors and the occurrence of Cenopalpus lineola in Pinus taiwanensis plantation indicated that the occurrence of Cenopalpus lineola was related to the average temperature, rainfall, relative humidity and other meteorological factors. The monthly average temperature and the 10-day average temperature were most closely related to the occurrence of Cenopalpus lineola, and the simulated curves were well consistent with the actual results. The number of Cenopalpus lineola increased with temperature. When the average temperature was above 14℃, the occurence trend of Cenopalpus lineola could be forecast by the regression equation which had a high reference and application value. The regression analyses on the multiple meteorological factors and the occurrence of Cenopalpus lineola showed that the number of Cenopalpus lineola was closely related with three groups of meteorological factor combinations, i.e., the monthly average temperature + monthly average rainfall + monthly average relative humidity, 10-day average temperature + 10-day rainfall, and 10-day average rainfall + 10-day relative humidity. The regression equation of 10-day average temperature + 10-day average rainfall meteorological factor combinations with the occurrence of Cenopalpus lineola would be of practical significance for guiding the pest control.