This article reports the newly discovered dinosaur footprints and the depositional environment at Xuanhua, Hebei Province. The study aims to ascertain the geological age and the classification of footprints, as well as the depositional environment of the Tuchengzi Formation. Towards this objective, LA- ICPMS zircon U- Pb dating of the tuff layer overlying the fossil layer was carried out on the basis of the profile measurements, sedimentary facies divisions and depositional environment analyses for the section containing the fossil layer and its over- and underlying layers, and detailed measurements and comparisons of the well preserved footprints was also conducted. The bottom of the Tuchengzi Formation represents alluvial fan depositional environment, the strata over- and underlying the footprints indicate fluvial depositional environment, and the fossil layer with a large number of exposed structures and gymnosperms fossils indicates littoral lacustrine depositional environment. The weighted mean age of LA- ICPMS zircon U- Pb (152. 3±0. 3 Ma, MSWD=0. 00106) indicates that the fossil layer belongs to the first member of the Tuchengzi Formation, equivalent to the middle to late Kimmeridgian of the Late Jurassic. The footprints are dominated by three- phalanges theropod footprints, including Grallator, Anchisauripus and Eubrontes. In addition, there are some suspected sauropod footprints. It has the highest community richness in the Tuchengzi Formation in the northern margin of North China. Site Ⅰ may be the largest dinosaur footprint site in northern China. Summarising, the first member of the Tuchengzi Formation in the Xuanhua- Xiahuayuan Basin represents fluvial- lake depositional environment. There were lush gymnosperms, a large community of dinosaurs, and occasional volcanic eruptions at that time. The newly discovered dinosaur footprints at Xuanhua not only fills the gap of dinosaur footprint fossils in the Xuanhua- Xiahuayuan area, but also enriches the biological assemblage of the Tuchengzi Formation in Yanliao area, and further provides new evidence for the chronostratigraphic division of the Tuchengzi Formation and the determination of the terrestrial J/K boundary.