Abstract: As a chronic problem with cold-drawn seamless steel pipes, inner surface scale in the form of lump or powder makes such pipes unsatisfactory to relevant customer requirement. Described here in the article is an inner surface descaling system for steel pipe. Actual operation result of the system shows that it is not only capable of meeting relevant customer requirement, but also has such advantages as easy operation, simplified and reliable structure, easy operation and maintenance, and high cost-effectiveness, being worth spreading.