The invention discloses environment-friendly repeated-writing paper and a preparation method therefor. According to the environment-friendly repeated-writing paper and the preparation method therefor, a hydroxyl protective group is added into a nano
bacterial cellulose suspension with excellent characteristics such as high water absorptivity and
water retention ability and good water and air permeability, so as to lower hydrophilicity; a staged reaction is carried out under strong base conditions, so that
bacterial cellulose reaches moderate water absorptivity and
water retention ability, ink can only be present in a
surface layer and be clear in writing while the ink is absorbed, and thus, writing, reading and subsequent
handwriting wiping are facilitated; then, a scientifically-compounded dispersant is added, and ultrasonic and high-
voltage pulse electric field combined dispersion is carried out, so that a stable and uniform modified
bacterial cellulose suspension is obtained; finally, the surface of raw paper is coated with the suspension so as to obtain the writing paper with appropriate ink absorbing uniformity and
adhesive power and a dense structure, thus, the writing property of the writing paper can be enhanced, and the clearness of writing is enhanced; and
waterproofing and oil-proofing actions can be achieved, most importantly, ink marks on the paper can be erased with a
cleanser and the paper can be reused for 40 to 100 times under the condition that the performance of the paper is not affected.