The invention relates to a method for controlling black liquor, in particular to a method for hyperfiltrating the black liquor by pulping and boiling way, belonging to the chemical field. The method comprises five steps: collecting the concentrated black liquor intensively; pre-processing the black liquor by a plate filter; hyperfiltrating and nanofiltrating the black liquor; recycling for boiling to prepare alkali; and backwashing waste liquor. The method traps the giant molecule and particles in the black liquor after the pulping and boiling processes to form the screening function, therebygreatly reducing the organic matter content; the method recycles the alkali in a clean solution after processed, thereby effectively reducing the rear end waste water processing load, generating value of recycling the alkali in the black liquor and generating value of burning the concentrated black liquor.