Jurassic-Cretaceous strata are widespread in outcrops of northern margin of West Kunlun Mountains. However, drilling data indicate that they are sparsely and discontinuously distributed in the foreland overlaid regions. To determine the contact relations between the Jurassic-Cretaceous and overlaying and underlying strata, and their distribution and thickness variation, new data of field geologic investigation and interpretation of seismic profiles are presented. Based on these contact relations, the authors establish structural interpretation models. The results provide significant constraints for the Mesozoic-Cenozoic evolution of piedmont fold and thrust belt in the front of West Kunlun Mountains and petroleum exploration in this region.