Direct-current fuse convenient for core replacement

The utility model discloses a direct-current fuse convenient for core replacement, which is provided with an outer shell, one end of the outer shell is provided with a wire inlet terminal, the other end of the outer shell is provided with a wire outlet terminal, and the direct-current fuse is characterized in that a movable frame is arranged in the outer shell, the movable frame is provided with a fusible core placing part, a fusible core is placed in the fusible core placing part, and the fusible core placing part is provided with a wire outlet terminal. A finger supporting part extending out of the outer shell is arranged on the movable frame in an extending mode, an arc-shaped block is arranged on one side of the movable frame in an outwards-protruding mode, an arc-shaped groove allowing the arc-shaped block to be clamped in is formed in the inner side of the outer shell, and a strip-shaped groove is formed in the top of the arc-shaped groove in a communicating mode. The arc-shaped blocks can rotate in the