The invention relates to the technical field of hygienic products, and provides a
sanitary napkin containing a middle convex core body and a preparation method thereof. The
sanitary napkin comprises asanitary napkin body, and the
sanitary napkin body comprises a liquid-permeable
surface layer, a transmission layer, the middle convex core body and a leakage-proof bottom layer which are arranged ina laminated mode from top to bottom; the middle convex core body comprises a first
absorption layer, a middle convex
absorption layer and a second
absorption layer from top to bottom, the middle convex absorption layer comprises a middle convex area and a non-middle convex area, and the
mass ratio of
fluff pulp absorbers in the middle convex area to
fluff pulp absorbers in the non-middle convex area is larger than 3: 1. The
fluff pulp absorbing body on the middle convex area is wrapped with absorbent paper, a gap is formed in the middle convex core body and penetrates through the middle convex core body, an outer ring flow guide groove and a straight strip flow guide groove are formed in the liquid-permeable
surface layer, and
permeation holes are formed in the liquid-permeable
surface layer. The sanitary towel solves the problems that sanitary towels in the prior art are low in
menstrual blood permeation and absorption speed, the surfaces of the sanitary towels are hard to keep dry,and side leakage and rear leakage are prone to occurring.