The Daba mountain is located in complex geological area where `the linkage between southern Qinling orogenic belt and Upper Yangtze foreland occurs. Its northwest side shows very conspicuous and spectacular examples of differentlytrending system of folds and buckle superposition. Detailed analyses of the kinematic, geometric and spatial relationships between all of the structural generations in the key areas of the northwestern Dabashan support development of the polyphase deformational history with at least three folding phases deformation. These are the NEnear EW trending folds(F1), near SN—NNW trending folds(F2) and NW trending folds(F3). In this paper, the evidence for NW folding deformation as well as the corresponding spatial structural elements are showed. And NW folds(F3) how to reprint and superpose on the late Jurassic Daba arcuate fold belt(F2) is also discussed. Combination of the regional deformation analysis and the fact that Cretaceous red bed were involved, it is thought that the NW folding forming may relate to the contractile deformation during or after the late of the early Cretaceous. The question concerning the cause or driving mechanism of NW trending folds(F3), however, deserve further attention. To distinguish NW folds in this areas may be significant to understand the tectonic evolution history in the western Dabashan Mountains.