The invention discloses a drum-type scraping-plate drying device for treatment of nickel-phosphorus plating waste liquid, belonging to the technical field of drying devices. According to the invention, concentrated nickel-phosphorus plating waste liquid is put into the inner side of a cylinder body by opening a feeding cover; the cylinder body is sealed through a sealing cover; a heater is startedto heat the interior of the cylinder body; a driving motor is started to drive a second belt wheel and a third circular transmission gear to rotate; the third circular transmission gear drives a fourth circular transmission gear to rotate so as to drive an annular inner gear ring to rotate; the cylinder body is driven to rotate through the annular inner gear ring and a connecting rod; the third circular transmission gear drives a fixed rod to rotate, and the fixed rod drives a compression rod to rotate, so a scraping plate is driven to scrape dry solids on the inner wall of the cylinder bodyinto the inner side of the cylinder body and scrape off the dry solids on the surface of the cylinder body along with continuous rotation of a high-temperature roller so as to realizing mixing of thedry solids with the nickel-phosphorus plating waste liquid, which enables the water content of solid waste thereof to be controlled to be 10% or below.