Abstract: Lodging in crops is defined as a permanent displacement of the clums from their upright position,People have carried out lots of research on which lodging influences yield and quality,and set up evaluation methods. The paper concluded evaluation methods of lodging resistance from chemical composition、microstructure、mechanics mechanism and QTLs mapping in crops.there were closely correlation of cellulose and lignin to lodging,and there were correlation between lodging and plant height,length of inter-nodles,the fresh weight of single stem,the area and density of vascular bundle,the numbers of vascular bundle in a field of microscope;some people have done many mechanical experiments about lodging.Finally,the paper discussed the direction of evaluation methods of lodging resistance.