The invention discloses a preparing method of table salt packaging paper. The method includes the steps of using high-quality bleaching sulfate needle-point leaf pulp and bleaching sulfate broad leafpulp as the raw materials, and conducting pulping and auxiliary material adding, wet page making, squeeze-dewatering, pre-drying, surface sizing, post-drying and the like to prepare the table salt packaging paper large in gram weight, high in opaqueness, tensile strength, bursting strength and tearing strength, small in breathability, high in moisture resistance and free of fluorescent substances.The product quality reaches the performance index of import similar products.