Production method of multi-layer paper with high interlayer bonding strength

The invention belongs to a papermaking technology, and relates to a production method of multi-layer paper with high interlayer bonding strength. The method comprises the following steps: (1) pulping, grinding and blending to obtain paper pulp required by each layer of paper for making multiple layers of paper; (2) papermaking: diluting the prepared pulp to a required concentration, dehydrating and forming each layer of forming net on a paper feeding machine, quantifying each layer to 40-200gsm, and spraying an auxiliary agent for interlayer bonding on each layer by using a spraying device; before each layer of wet paper sheet is compounded, each layer of wet paper sheet is heated by steam, so that the internal temperature of the paper sheet reaches 35-55 DEG C; and (3) compounding each layer of wet paper sheet, squeezing, carrying out steam drying, carrying out surface treatment, and reeling to obtain the finished paper. Multi-layer paper with good interlayer bonding strength can be manufactured in a convent