The invention discloses ground-to-wall composite paste which is characterized by comprising the following components in parts by weight: 100 parts of water, 7-11 parts of bentonite, 0.2-0.3 part of sodium carbonate and 0.1-0.2 part of a polymer, wherein the polymer comprises the following components in parts by weight: 300 parts of carboxylic acid modified polyacrylamide, 500-600 parts of calcium carbonate and 130-170 parts of modified sodium polyacrylate. The ground-to-wall composite paste has the advantages of being low in filtering loss, high in paste homogenization, high in dreg carrying capacity, good in mud cake formation quality and good in paste stability.