Abstract: In this paper，the impact of climatic variation capacity on maize productive capacity are analizedby use of the meteorological data of 72 stations in the Loess Plateau area for 30 years．The resultsshow that，inspite of the general climatic trend was getting warmer during 1980’s in this area，thetemperature within growing seasons did not go up but dropped a little．Thus，the light-temperatureproductive capacity of maize in 1980s was less than that in 1960’s or 1970’s Due to the influence ofthe change of precipitation，the climatic productive capacity in 1980’s was higher than that in 1960’s or1970’s for all parts in this area except for Shaanxi Province.

Key words: Climatic variation Productive eapacity Maize growing season