TneglobalchangeofclimateanditsinfluenceonthecroppingsysteminChinahavebeeninvestigatedinthispaper.ItisfoundthatthetemperaturewasincreasedduringthelastdecadeandtheprecipitationdecreasedinnorthernChinaandincreasedinsouthernChinaduringthelast30years.Thesealevelhasbeenrisingbyabout21—26cminthecoastalareassouthof30°NinChinaduringthelast100years.Themostofresultsassimulatedbythegeneralcirculationmodels（GCMs）showthatthetemperatureincreasewouldamounttoabout2°—4°CinthemostpartsofChinaandprecipitationandsoilmoisturemightbedecreasedinnorthernChinaandincreasedinsourthernChinaduetodoublingofcarbondioxide（CO2）.TheeffectsofdoubledCO2ongrowthperiodandclimaticyieldcapabilityinChinahavebeenestimatedroughly.ItisshownthattheregionsofthegrowthperiodinChinawouldbemovednorthwardaboutfivedegreeslatitudeandtheclimaticyieldcapabilitymightbeincreasedbyabout10％inthemostpartsofChina.
