Hydrogen purification system

The utility model discloses a hydrogen purification system. The hydrogen purification system comprises at least two drying towers, a power junction box and a power cable. The drying tower comprises a heating pipe, a tower top junction box and a heating pipe high-temperature extension line, and the heating pipe high-temperature extension line is electrically connected to the root of the heating pipe and extends to the corresponding tower top junction box. And the high-temperature extended line of the heating pipe extends into the power junction box through the corresponding tower top junction box and is electrically connected with the power cable. According to the hydrogen purification system disclosed by the utility model, the root part of the heating pipe extends into the power junction box of the non-tower top junction box through the high-temperature lengthening line of the heating pipe, so that cables on two sides are butted in the power junction box. Therefore, compared with the mode that the tower top j