Abstract: By studying the problems of parallel isosurface extraction and rendering,a novel framework is proposed according to the characters of 3D scalar fields.This framework adopts the static task distribution method to keep balance and Marching Tetrahedra algorithm to extract isosurface,and proposes a mixed parallel rendering and combining method based on rendering node control model,which is prearranged for parallel rendering and scene integration.An effective improvement on the capability of parallel isosurface extraction and rendering of large-scale 3D scalar fields is given by the experiments.