The utility model provides an inside cleaning device of copper bar chain, is including arranging the chain bracket, and the both ends of arranging the chain bracket are provided with drive roll and driven roll respectively, and the outside of drive roll and driven roll is encircleed has copper bar chain, and copper bar chain's inboard the range has many to arrange the chain recess with copper barchain traffic direction vertically, and copper bar chain's outside lower part is provided with holds in the palm the rail under the row's chain that is used for bearing copper bar chain, and copper bar chain's inboard is provided with the cleaning device who is used for cleanness copper bar chain, cleaning device contacts with copper bar chain's inboard lower part with the lower part fixed connection who arranges the chain bracket, cleaning device's lower part, cleaning device include shell, inner shell, bearing roller, pulley and the clean brush of arranging, the upper portion of shell with arrange chain bracket fixed connection, the lower part opening of shell, the inner shell sets up in the shell, is provided with the resilient means about the control inner shell between inner shell andthe shell, the fixed clean brush of arranging that is used for cleaning copper bar chain that is provided with can be dismantled in the lower part of inner shell. The utility model discloses simple structure need not drive arrangement, has overcome the difficult problem of filament cutter copper bar chain maintenance.