The invention discloses an open-type field six-degree-of-freedom series-parallel processing robot, which comprises a platform, at least three support legs, a processing spindle and a processing cutter. The support legs are symmetrically mounted on the corners of the platform around the center of the platform and each support leg consists of a swinging joint, a leg lifting joint, a flexion-extension joint, a foot ball joint and a foot. The processing spindle is mounted in the middle of the platform, and the processing cutter is installed on the processing spindle. The robot further comprises avisual benchmark, a visual camera, three force sensors and an intelligent controller. The visual benchmark is installed on the processing spindle and is located in the visual range of the visual camera, the processing spindle is connected with the platform by means of three symmetrically arranged force sensors, and the visual camera and the force sensors are all connected with the intelligent controller. The series-parallel processing robot has the advantages of compact structure, small size, low cost and high processing and measuring precision.