Objective of the study is about to detect quantitative trait loci (QTLs) for such as plant height and panicle length of millet. F2 population derived from crosses of the millet cultivars Shen3ingu20 respectively was used for QTL analysis. Data of trait about plant height, panicle length and others was collected and recorded. By analysis,it said the traits recorded are all quantitative traits. Using SSR as molecular markers,54 markers were divided into 10 linkage group.The presence of two main-effect QTLs which are related with plant height was declared by Conplete interval mapping(BASTEN C J) using QTL IciMapping 3.0.1.21,and the total effect was 45.9637%.One main-effect QTL which is related with panicle height was detected,and its individual effect is 14.9647%.It said that the main-effect QTL about panicle weight and the one about grain weigh was the same locus,and the effects of them were 11.9601% and 10.1879%.Gene-interaction analysis indicated that there were gene-interactions between 6 QTL pairs with additive effects ranging from -0.4986 to 16.6407 and individual effects from 2.2716 to 6.7478.Detection of QTLs for traits of millet is sensitive to environment. QTLs of all traits spread around chromosomes, and gene-interaction occurs frequently.