Dapinggou area of eastern Altun Mountains is situated in the clamping area between NE-trending Altun strike-slip fault and EW-trending northern Altyn Mountains margin fault. In this paper, the authors take an attempt to restore the outline of fold structure in the Dapinggou area. Then the authors analyze the origin of the fold structure and consider that the basic conditions for forming Dapinggou fold structure are the competent bed of the Proterozoic carbonatite southern of the Kaladaban-Akedaban fault. And the authors also believe that the direct cause is lateral compression in the western end of the sedimentary rock of Zhuoabulake Formation result from sinistral strike slip of the NEE-trending Zhuoabulake fault in the regional SN-trending compressive stress field.