Portable food fresh-keeping box used for sampling

The utility model discloses a portable food fresh-keeping box used for sampling. The portable food fresh-keeping box comprises a box body, a pull rod arranged on the box body, a plurality of wheels arranged on the lower portion of the box body, an ice cube containing box arranged in the box body, and a plurality of food fresh-keeping boxes arranged in the box body. The ice cube containing box is connected with each food fresh-keeping box through an air conveying pipe. Each food fresh-keeping box is provided with a valve plate used for controlling cold air of the corresponding air conveying pipe and the corresponding food fresh-keeping box to be communicated or disconnected. The valve plates are exposed out of the box body. The ice cube containing box is communicated with an air inlet hole in the box body through an air inlet pipe. A fan is arranged on the air inlet pipe. The portable food fresh-keeping box has the advantages that all samples can be refrigerated in time, the deterioration process of the sample