The present utility model relates to the art of medical imaging devices. The present utility model discloses a gravity balance means for a cross arm of X-ray equipment, which means is mounted within the cross arm for maintaining gravity balance of the cross arm, wherein the gravity balance means comprises a counter weight module, capable of moving along in a direction opposite to the direction in which a tube of X-ray equipment moves. The gravity balance means for the cross arm of X-ray equipment as provided by the present utility model and a corresponding X-ray equipment, solving the problem of self-balancing of the cross arm of X-ray equipment, thereby improving the security of equipment, reducing production cost of the cross arm, expanding application scope of the cross arm, and eliminating risk accidents of exceptional inclination and rotation in an imbalance state of the cross arm.
