The invention belongs to the technical field of papermaking and particularly relates to a kraft board paper and a manufacturing method thereof. The kraft board paper comprises a surface layer, a corelayer and a bottom layer, and raw materials of the surface layer, the core layer and the bottom layer contain GCC slurry. The GCC slurry comprises water, GCC, a three-dimensional-network structured polyacrylamide derivative with a benzene ring branch chain and anionic polyacrylamide. By coating of GCC with a polyacrylamide polymer, the GCC particle size is increased, compatibility to an organic paper pulp system is improved, and the paper pulp fixation rate of GCC is increased. The invention further discloses a kraft board paper machine and a kraft board paper manufacturing method. The kraft board paper obtained through the paper machine and the manufacturing method is high in mechanical strength and whiteness, and whiteness is not sharply reduced after long-term use. In addition, a papermaking process is green, environmentally friendly, free of pollution and low in production cost.