The invention particularly relates to a building steel pipe rust removal device, and aims at achieving the technical purpose of providing the building steel pipe rust removal device. To achieve the above technical purpose, the building steel pipe rust removal device is provided and comprises a right installing plate and the like. The ground is provided with the right installing plate and a left installing plate. The right installing plate is located on the right side of the left installing plate. The right installing plate and the left installing plate are provided with grooves. A fixing plateis arranged on each of the tops of the right installing plate and the left installing plate and provided with a supporting and fixing mechanism, wherein a sound isolation hollow barrel is arranged onthe top of the fixing plate, a guiding hole is formed in the top of the sound isolation hollow barrel, and the sound isolation hollow barrel is provided with a drive mechanism. The building steel pipe rust removal device achieves the effects that manual rust removal can be replaced, steel pipe moving is convenient, and time and labor can be saved for workers; the drive mechanism can make a grinding body move up and down in a steel pipe to remove rust in the steel pipe; and an automatic lifting mechanism can automatically move the steel pipein to the sound isolation hollow barrel for grinding.