Volatile organic compound sampling tube storage box

A preservation box body comprises a gas inlet box, a sampling box and a gas outlet box, the gas inlet box, the sampling box and the gas outlet box are sequentially stacked and detachably installed and fixed, a plurality of heating sleeves are arranged in the sampling box, sampling pipes are arranged in the heating sleeves, a nitrogen tank is further arranged in the sampling box and communicated with the gas inlet box, and the nitrogen tank is communicated with the gas outlet box. A gas inlet conveying channel and a gas outlet conveying channel are arranged in the gas inlet box and the gas outlet box respectively, the sampling pipes are pressed and fixed through the gas outlet box and the gas inlet box, valves are arranged on the nitrogen tank, the gas inlet conveying channel and the gas outlet conveying channel, and lock catch structures are arranged between the gas outlet box and the sampling box and between the gas inlet box and the sampling box. An air inlet pipeline facilitating air inlet is arranged on t