Cambrian strata developed and cropped out well in Zhangxia and Gushan area of Changqing with clear contacting relation. Rock types and sedimentary structure are rich, palaeobio-fossils are concentrated and kept well, and has a long study history. It is an ideal area for contrasting and studying sequence stratigraphy and multi-stratigraphic division. It is also a good base for carrying out geological and scientific education, which is a rare “stratigraphic laboratory”. It has been determined as “standard profile of Huabei Cambrian” for a long time, and listed as geonomy text-book. It has important significance to carrying out effective protection countermeasures in geological trace.