Copper-nickel deposits of industrial value have so far been found in eigh- teen rock bodies along seven rock belts of China. According to their rock as- semblages, these nickel-bearing rock bodies might be divided into three types; ultrabasic rocks, norite and komatiite, with most ore deposits occurring in the first type. Metallization shows the character that small rock bodies formed large nickel deposits. The nickel-bearing magma is of komatiite series instead of belonging to tholeiitic series. The ore-forming magma was formed through partial melting of the upper mantle, with the source area characterized by en- richment of U and Th and depletion of Cr. The continental margin with well developed deep faults is the most favorable place for the development of ni- ckel deposits.