The invention provides a making method of a stainless steel solid waste pellet. The design is reasonable, environment-friendly, and saves resources. The method includes the steps of: (1) using nickel-containing washing wastewater water treatment sludge, nickel-containing steelmaking or steel rolling oxidized scale, and nickel-containing steelmaking precipitator dust solid waste as raw materials; (2) premixing the steelmaking precipitator dust, washing wastewater water treatment sludge, and steelmaking or steel rolling oxidized scale according to a weight ratio of (40-50):(45-40):(15-10), and stirring the substances evenly to obtain a mixture; and (3) letting the mixture enter a ball press machine through a combined conveyor to undergo cold press molding so as to obtain cold-pressed pellets with a diameter of 40-50mm, letting the cold-pressed pellets enter a chain type dryer to undergo drying molding, and controlling the oven temperature of the dryer at 100-150DEG C, carrying out circulating reciprocating drying on the materials in the oven, and sending the finally molded pellets into a finished product bin.