The invention discloses a manganese slag-solid waste mixed sintering brick making method, which includes that manganese slag, shale and fly ash which are dried to have constant weight are mixed and ground together or are respectively ground and then mixed in certain ratio, and are sieved according to a certain gradation requirement to obtain preparation materials of solid waste mixed sintering brick, then a certain amount of sodium humate stabilizer is added and uniformly stirred with clear water and is aged for a period of time, then is produced to be samples by an extruder, at last the finished products of solid waste mixed sintering bricks are obtained by the heat treatment processes of drying, roasting, cooling and the like. The invention uses electrolytic manganese dioxide slag as the main material, adopts the shale to replace clay as supplementary raw material, and adds the fly ash to adjust the components on the basis, the manganese slag-solid waste sintering brick is prepared through the processes of proportioning, preprocessing, patternmaking, drying, roasting and cooling, and the utilization of a large amount of solid waste resource is realized.