Abstract: Organic type fireproof box has been widely used in power cable channels, but performance test research of the box is rarely reported.Samples of organic type fireproof box from 6 different manufacturers on the market were tested. The results showed that 6 samples met the requirements of the existing standards in terms of burning behavior, oxygen index, and chemical resistance, etc. But the barcol hardness and water absorption of some samples were not qualified, which would inevitably lead to the accelerated deterioration, decreased fire resistance performance and reduction of service life. In the long-term operation process, it will lay hidden dangers for the safe operation of power cables. At present, more attention is paid to the performance of fire prevention in sampling inspection, and quality supervision on the physical and chemical properties should be enhanced. Barcol hardness and water absorption should be regarded as the necessary inspection item of sampling inspection, especially in the adverse circumstances or the key section of fire prevention.