Abstract: According to an integrated study of the data of regional survey of the 1:50000 Xingan Map Series in the Xiajiang area, central Jiangxi, the authors for the first time propose the view that the Devonian strata in the area are an allochthon and hold that the Devonian was thrust from NW to SE in the late Indosinian to early Yanshanian and then again underwent extension and detachment to the SE in the late Yanshanian stage. There are many reports about the existence of thrust nappe and sliding nappe structures in northern and southern Jiangxi but few reports have been read that they exist in central Jiangxi. The discovery and determination of thrust nappe and sliding nappe structures in the Xiajiang area this time have great tectonic significance for the understanding the relation of the NNE-trending thrust nappe and sliding nappe structures between southern and northern Jiangxi and even the understanding of the whole. This paper mainly deals with the characteristics of the thrust nappe and sliding nappe structures with detailed field first-hand data and preliminarily analyzes their genetic mechanism.