Controlled atmosphere fresh-keeping display cabinet

The utility model discloses a modified atmosphere fresh-keeping display cabinet which comprises a bottom box, a cabinet body is arranged on the upper end face of the bottom box, a refrigerating system used for refrigerating the interior of the cabinet body is arranged in the bottom box, a cabinet door is arranged on the cabinet body, an air extracting pump is installed on one side of the upper end face of the cabinet body, and the input end of the air extracting pump is communicated with the interior of the cabinet body. Through the arrangement of the sucking pump, air in the cabinet body can be sucked during use, the air content in the cabinet body is reduced, the interior of the cabinet body is located in a negative pressure device, then the sucking pump is turned on through the controller to inject a proper amount of nitrogen into the cabinet body, and a refrigerating system and an ultraviolet germicidal lamp are matched, so that the refrigerating effect is improved. The respiration of vegetables can be ef