The utility model relates to refrigeration equipment, a shelf assembly and a shelf thereof. The shelf is used for fixing an ultrahigh frequency antenna and comprises a base, a grid frame and a cover plate, wherein the base is provided with an accommodating groove and a wire outlet hole which are communicated with each other, and the wire outlet hole is used for penetrating a connecting wire of theultrahigh-frequency antenna; the grid frame is located in the containing groove and connected with the base, an antenna containing area is formed on the grid frame, and the antenna containing area isused for containing an antenna body of the ultrahigh frequency antenna connected with the connecting wire. The antenna body of the ultrahigh frequency antenna is arranged in the antenna placing area.The connecting wire connected with the antenna body is in communication connection with the outside through the wire outlet hole; the cover plate covers the base, so that a closed space is formed inthe accommodating groove; the ultrahigh frequency antenna is positioned in the shelf, and the ultrahigh frequency antenna is closer to the electronic tag stored on the shelf, so that the signal receiving stroke of the ultrahigh frequency antenna is shorter, the received/transmitted signal is more stable, and the problem that the signal of the ultrahigh frequency antenna is unstable is solved.