A deep oversize gold deposit have been found in the Jiaojia field ,Shandong province by geologic exploration during 3 year. The deposit consist of 89 ore body and 4 orebody group. Its gold resources are 105t. The No.Ⅰ-1 orebody distribute along main fault surface of Jiaojia fracture.The Jiaojia field total gold resources exceeded 230t，and become a world-class oversize gold deposit. Some new gold metallogenic law be revealed by comparative study for shallow and deep gold deposits. There is ore-free interval or weak mineralized zone between shallow and deep gold deposit. Thick orebody locate lower turning point on dip angle slowing down from the steep of the Jiaojia fracture. Mineral deposit model of Jiaojia gold belt is distribution of the deposits along the \"one tectonic belt，two mineralized enrichment zone and three mineralized alteration zone\". The K-Ar isotopic ages of fault clay are considered 131.05 ~ 123.53Ma and 48.57 ~ 41.18Ma by radiometric dating. This shows that the main formation age of the fault and gold mineralization are synchronous period. Isotopic ages of gold consistent with statistical peak value of isotopic ages of the Weideshan granite. This hints that magmatic activity of Weideshan granite is the direct factor of mineralization of the \"Jiaojia-type\" gold .