The invention discloses a direct-current power supply output short circuit protection device. The direct-current power supply output short circuit protection device comprises a porcelain seat, a porcelain cover and a manual handle, wherein insulating pipe sleeves are fixedly bonded on the left side and the right side inside the porcelain seat, connecting conductors penetrate and wrap the internalportions of the insulating pipe sleeves, elastic connecting components are arranged on the inner sides of the connecting conductors, a fixed base is fixedly connected to the inner wall of the porcelain seat, a reserved groove is formed in the fixed base, the porcelain cover is arranged at the upper end of the fixed base, a rubber pad is fixedly bonded on the outer side of the porcelain cover, andthe manual handle is fixedly bonded on the upper end of the porcelain cover. The direct-current power supply output short circuit protection device can perform elastic stretching in a certain range through connection of a fuse and a metal spring to avoid the phenomenon that the fuse independently splits due to thermal expansion and contraction because of the air temperature reason, ensure that thefuse fusing is caused because the internal temperature of connecting conductor is too high, protect the circuit when DC power supply output short circuit occurs and improve the reliability that the device used.