A foldable six degrees of freedom light type operating arm with a joint axis orthogonal relation is characterized in that a first rotating joint, a second rotating joint, a large arm connecting rod, a third rotating joint, a forth rotating joint, a fifth rotating joint and a sixth rotating joint are arranged on a foundation base in sequence, an output end of the sixth rotating joint is connected with a tail-end single degrees of freedom paw, wherein an axis of the first rotating joint is arranged coaxially with the foundation base and is perpendicular to an axis of the second rotating joint, the axis of the second rotating joint is parallel to an axis of the third rotating joint, the axis of the third rotating joint is perpendicular to an axis of the forth rotating joint, the axis of the forth rotating joint is perpendicular to an axis of the fifth rotating joint, the axis of the fifth rotating joint is perpendicular to an axis of the sixth rotating joint, and the axis of the forth rotating joint, the axis of the fifth rotating joint and the axis of the sixth rotating joint are intersected at one point in space. By means of the foldable six degrees of freedom light type operating arm with the joint axis orthogonal relation, the integrated structure of an operating arm is simpler and more convenient, and quality is more portable and convenient, so that the optimal operating flexible performance of the tail end of the operating arm can be assured.