Lockable rotating foot structure

The utility model discloses a lockable rotating foot structure. The lockable rotating foot structure comprises a rod body, a cross beam and a locking piece, the cross beam is rotatably arranged at the lower end of the rod body, and rollers are arranged at the two ends of the cross beam; the locking piece comprises a transverse part and an interference part which are integrally formed and connected. The locking piece is arranged on one side face of the cross beam in an openable or closable mode, when the locking piece is closed, the transverse part makes contact with the side face of the cross beam, the interference part makes contact with the surface of the rod body, at the moment, if the cross beam rotates, the interference part abuts against the rod body, the cross beam is subjected to resistance opposite to the rotating direction, and the cross beam cannot rotate; it is ensured that the cross beam can be kept horizontal with the screen during assembly, pedestrians are not prone to bumbling down, space wast