Series D type water power pulp machine has changed the thick liquid material streamline direction of the traditional round type pulp machine and make the thick liquid material always tend to the center direction. It improve the height of thick liquid location of the center position, increased the thick liquid material to the number of striking times of the impeller at the same time, discongested 30% of ability after improving the thick liquid material. It is ideal equipment that the papermaking industry used in the intermittence and succession to pulp the thick liquid board, decreased paper and wasted paper.