Abstract: Under different artificial temperature,the contents of soluble sugar,proline and malonaldehyde(MDA) as well as activity of POD of 10 Compositae weeds including Cirsium souliei,Erigeron canadensis.L.,Herba Gnaphalii Affinis,Herba Artemisiae Scoparia,Ixeris chinesis(Thunb.)Nakal,Baphicacanthus cusia,Carpesium abrotanoides L.,Youngia japonica (Linn.)DC.,Hemistepta lyrata Bunge and Herba Cephalanoploris are tested under 4　℃,24　℃ and 44　℃ temperature respectively.The MDA changes of ten Compositae weeds indicated that their resistance to high temperature of 44　℃ ranked as Baphicacanthus cusia,Hemistepta lyrata Bunge,Youngia japonica (Linn.)DC.,Herba Gnaphalii Affinis,Herba Cephalanoploris,Cirsium souliei,Erigeron canadensis.L,Carpesium abrotanoides L.,Herba Artemisiae Scoparia and Ixeris chinesis(Thunb.)Nakal,while those to low temperature of 4　℃ ranked as Carpesium abrotanoides L.,Erigeron canadensis L.,Baphicacanthus cusia,Herba Artemisiae Scoparia,Cirsium souliei,Hemistepta lyrata Bunge,Ixeris chinesis(Thunb.)Nakal,Herba Cephalanoploris,Youngia japonica (Linn.)DC.and Herba Gnaphalii Affinis.

Key words: compositae weeds, physiological indices, temperature stress