a housing configured as a frame structure;

a plurality of hash boards arranged side by side in a first accommodation space in the housing along a left-right direction, each of which is arranged vertically to the left-right direction and each of which is slidably arranged in the first accommodation space;

a power module arranged in a second accommodation space in the housing;

an electrical connection board arranged in the housing, wherein the hash board and the power module respectively connected with the electrical connection board, and the power module supplies power to the hash board through the electrical connection board; and

two conductive connection boards stacked in a front-rear direction on the electrical connection board, wherein a first conductive connection board of the two conductive connection boards contacts the electrical connection board and a second conductive connection board of the two conductive connection boards comprises a stepped portion that contacts the electrical connection board, such that the first conducive connection board and the stepped portion are spaced and arranged side by side in an upper-down direction and connect positive and negative electrodes respectively, each of the first conductive connection board and the stepped portion is provided with multiple conductive pins; the conductive pins on the two conductive connection boards correspond to each other to form a plurality pair of conductive pins; each pair of conductive pins arranged in the upper-down direction corresponds to each hash board and is electrically connected to supply power to the hash board, and each pair of conductive pins is detachably matched with each hash board to connect or disconnect a power supply path of the hash board.