The invention discloses a slot rack structure for indoor cable arrangement. The slot rack structure comprises a bracket and a cover plate, blind holes are formed in the side edges of the bracket, an inclined plane A is arranged in the middle of each adjusting rod, extending parts parallel to the side edges of the bracket are fixed to the two ends of the cover plate, an arc-shaped elastic connecting piece is arranged in the middle of each extending part, grooves communicated with the blind holes are formed in the side walls of the bracket, an inclined plane B matched with the corresponding inclined plane A is arranged at the movable end of each jacking rod, and the movable ends of the jacking rods penetrate through the grooves and are arranged in the blind holes. The inclined planes A are matched with the inclined planes B in a contact mode, the jacking rods move outwards, the jacking rods drive two connecting rods to continue to move forwards, the other ends of the two connecting rodsare hinged to the arc-shaped elastic connecting pieces and apply tensile force to the arc-shaped elastic connecting pieces, and then the arc-shaped elastic connecting pieces deform, that is to say, the arc-shaped elastic connecting pieces are changed to be shaped like a straight line from an arc, so that cables have enough containing space, and the protection function of a cable bridge to the cables is guaranteed while it is guaranteed that the multiple cables are arranged simultaneously.