Abstract: Marine carbonate rocks are widespread and their deposit layers are huge thick in the Middle-Upper Proterozoic of North China.At the same time,many outcrops of asphalt and oil seepages in the Middle-Upper Proterozoic strata indicate that their hydrocarbon-generating potential appraising is an important subject to further study.In this article,by managing the pyrolysis data of organic matter,we concluded that kerogen was mainly humic (Ⅱ) type and humic-sapropelic (Ⅲ) type with few Ⅰ type.This is of great differences with the fact that the evolution of living beings standed on initial stages and organic matter held sapropelic type at that time.Moreover,as for the oil-generating potential,the kerogen type of the Xiamaling Group is better than that of other groups.By systematical studying of the organic matter abundance,the hydrocarbon-generating potential and the kerogen types of samples,the authors synthetically determined the hydrocarbon-generating potential of samples in the Middle-Upper Proterozoic of North Huabei area and found three positions of better hydrocarbon-generating potential,namely,the Xiamaling Group,the Tieling Group and the Hongshuizhuang Group.