snap fit structure and respectively provided with a semicircular groove matched with the pillar and a protruded portion arranged at an outside of an end edge of the semicircular groove and each of the locking pieces is provided with a clamping portion for coupling with the protruded portion of the pillar clamp application_number US 201414475586 A description the preferred embodiments of the commodity shelving system of the present invention will be described below in details with reference to the accompanied drawings though it will be apparent to those skilled in the art that some features that are not particularly important to the understanding of the commodity shelving system may not be shown in the accompanied drawings for the sake of clarity in addition it should also be understood that the commodity shelving system described in the present application is not limited to the specific embodiments described below and that various alterations and modifications may be made thereto by those skilled in the art without departing from the spirit or scope of the present application for example elements and or features of various illustrative embodiments may be combined with each other and or substituted for each other within the scope of the present application the present invention provides a commodity shelving system comprising pillars shelves and a fixing mechanism for fixing the shelves to the pillars the system of the present invention is easy in assembling and disassembling and capable of altering the quantity and level of the shelves without disassembling the whole system referring to fig1 to fig1 which illustrate an embodiment of the fixing mechanism of the commodity shelving system provided by the present invention.