The invention discloses an all-round-grinding-based sanding machine for cooking utensils and an operation method of the sanding machine, and belongs to the technical field of grinding and sanding equipment. According to the key points of the technical scheme, the sanding machine comprises a machine tool, and a workpiece fixing device capable of directionally rotating, a workpiece sanding device and a moving mechanism which drives the workpiece sanding device to move around the workpiece fixing device are arranged on the machine tool; and the moving mechanism comprises a first horizontal movingdevice which drives the workpiece sanding device to move in the horizontal direction, a second horizontal moving device which drives the workpiece sanding device to move in the vertical direction anda turning device which drives the workpiece sanding device to turn. By driving the first horizontal moving device and the second horizontal moving device, the workpiece sanding device is close to andattached to the cooking utensils, after the bottoms or side surfaces of the cooking utensils are ground, the turning device is driven to turn 90 degrees to enable the workpiece sanding device to grind and polish the bottoms or side surfaces of the cooking utensils, the polishing method enables the cooking utensils to be subjected to machine-shaping at a time, and the machining efficiency is improved.