The invention discloses a pulp-grinding method for improving fibre brooming, comprising the following steps: adding rigid filler to the pulp before grinding, and grinding after mixing the rigid filler and the pulp fibre, wherein the additive amount of the rigid filler accounts for 1%-30% of the total mass of the pulp; the rigid filler is any one or the mixture of several types of PCC, GCC, Talc, titanium pigment and bentonite of filler grade; and the rigid filler can also be fibrous mineral fibre. The adoption of the pulp-grinding method can improve devillicate brooming degree of the fibre, improve paper strength and interweaving, or can improve the ash content of paper and reduce fibre consumption under the condition of maintaining a considerable paper strength, and can reduce production cost and reduce the grinding energy consumption while protecting the environment.