The invention discloses a method for producing a multi-functional plum blossom-shaped papermaking sludge lightweight through-hole ceramsite. The method comprises ingredient stirring, extrusion granulation, drying, roasting, thermal insulation, screening and sealed packaging. The ingredients comprise papermaking sludge, high viscosity attapulgite clay, zeolite, activated carclazyte residues, activated alumina, nanometer zinc oxide, light magnesium oxide, light calcium carbonate, hollow microbeads, expanded perlite and sodium dodecyl sulfate. The ceramsite has the advantages of good adsorption performance, high effective specific surface area, high porosity, low bulk density, light weight, high strength and integration of micropores and macropores and is suitable for a variety of greening projects such as water purification and filtration, soil repair, landscaping, roof greening and desert management. The method is suitable for production of multi-functional lightweight plum blossom-shaped papermaking sludge through-hole ceramsites in plum blossom-type shape, cylinder shape and ball shape.