The rock type, reservoir space and physical property of Archaeozoic reservoir are studied by means of core observation, thin section and logging analysis. The result shows that Archaeozoic reservoir rocks are mainly composed of granitic rock, dioritoid and dike rock; the reservoir space of Archaeozoic burial hill is mainly fracture; emposieu pore and eluvial pore are valid for oil and gas accumulation; the Archaeozoic reservoir belongs to fractured reservoir with strong heterogeneity both in vertical and areal, and mainly developed in three intervals （the range from 0 to 30 m, from 30 to 60 mand from60 to 120 m） under the apex face of burial hill and distributed around burial hills presented in banded in the plane.