The invention provides a mobile carrying robot for logistics storage. The robot comprises a four-wheel trolley chassis, a steering engine for steering, a large mechanical arm, a small mechanical arm,a mobile portal frame, a front axle structure, a trolley body structure, a damping device and other assemblies. Firstly, the robot actively moves to the vicinity of objects, the large mechanical arm is used for clamping and extracting the objects, then the objects are placed on a cargo circulating storage frame, a system performs the operation for the next round according to the sizes of the objects, if the objects need to be combined and classified, the objects are firstly moved to the corresponding positions through the circulating storage frame, then the mobile portal frame at the rear carries the small mechanical arm to clamp the objects and place the objects into corresponding lattices of a storage cabinet, if the objects need to be moved to the next station in batches, a push-pull door at the rear portion of the storage cabinet can be manually opened for manual extraction, if the objects need to be supplemented to a warehouse large-scale goods shelf, "reverse operation" is performed, the objects are clamped by the small mechanical arm to be placed on the cargo circulating storage frame, and then the objects are moved and carried by the large mechanical arm.