The invention relates to a packaging paper production method. The packaging paper production method comprises the following steps of (1) mixing and kneading 50 parts by weight of poplar root bark, 40 parts by weight of cedar bark, 0.25 part by weight of sodium bicarbonate, 3 parts by weight of calcium carbonate and 3 parts by weight of ethanol solution of ethyl acetate for 2 hours; (2) adding distilled water of which the weight is three times of that of the processed raw materials in the processed raw materials, and stirring for one hour to obtain size A; (3) adding 8 parts by weight of modified starch and 0.2 part by weight of nano silver in the size A, and carrying out ultrasonic treatment; (4) carrying out heat preservation on the processed raw materials under 95 DEG C, and stirring during a heat preservation process; (5) pulping the processed raw materials; (6) molding the processed raw materials by using a die, drying, and obtaining packaging paper. The packaging paper production method disclosed by the invention is simple, the poplar root bark, the cedar bark and the modified starch are used as main raw materials, the prepared packaging paper can be naturally degraded and has no pollution on environment, the packaging paper per se is non-toxic, and an application range is wide.