The invention discloses a drum wall cleaner, which comprises an air storage tank having an intake pipe and an exhaust pipe, a pneumatic release assembly, an air blast pipe and a nozzle; the exhaust pipe and the air blast pipe are fixedly connected through a flange; the pneumatic release assembly is positioned between the air blast pipe and the nozzle; and an air inlet and an air nozzle of the pneumatic release assembly are connected with the air blast pipe and the nozzle respectively. The drum wall cleaner has the advantages of rational design, simple structure, easy operation, thorough cleaning of materials stuck on the inner wall of the drum, capability of ensuring normal operation of the drum, high practicability and easy popularization and application.