The utility model relates to a block terminal field provides a railway tunnel block terminal, including interior box and outer box, interior box is placed in the outer container is internal, interior box with outer box all has the door plant that can open, and the internal integration of inner box has a plurality of electric elements, installs a plurality of the 2nd electric elements on the interior box door plant, and each electric elements and at least one the 2nd electric elements wherein are connected, still be provided with each the 2nd electric elements's of shroud sealed cowling subassembly on the interior box door plant, the block terminal still includes the cable business turn over line for two electric elements of each electric elements and ge di power supply, the cable pass in and out the line by the sealed cowling subassembly extends to the external side of outer container. The utility model discloses a railway tunnel block terminal, the bilayer structure of box and outer box in adopting in the box, separates each the 2nd electric elements and the external world an electric elements and the 2nd electric elements in can effectively protecting in the box with the sealed cowling subassembly including a plurality of electric elements are integrated.