The utility model relates to a blasting cavity electrode array test system belongs to the blasting test system. Arrange the electrode in pairs along steel pipe axial direction, this electrode package draws together positive pole and negative pole, whenever is in the same cross section of steel pipe to the electrode, leaves a determining deviation between the two poles of the earth, and the one end of this steel pipe be conical end, the other end is the open end, whenever is connected with each test channel of data acquisition instrument behind power no. 1, divider resistance no. 1, switch no. 1 respectively the wire of drawing in the electrode follow open end of steel pipe no. 1, this data acquisition instrument is still including the passageway of connecting the cartridge bag, and this passageway passes through two series connection powers no. 2 in the wire, divider resistance no. 2, switch no. 2. The advantage is novel structure, can test at wild spot, can put the silt or the arbitrary degree of depth under water, and the measuring accuracy is optional, as long as the electrode is encrypted, can improve the measuring accuracy, be 50mm like electrode distance, the measuring accuracy should be 50mm, and test principle is simple, and the test result is reliable, and it is wide to be suitable for the testing ring border.