The invention discloses an optical fiber energy transmitting sealing assembly used for a laser initiating explosive device. The optical fiber energy transmitting sealing assembly used for the laser initiating explosive device is characterized in that the optical fiber energy transmitting sealing assembly used for the laser initiating explosive device comprises a metal case, an optical fiber plug, a protective gasket and a ceramic bushing, one end of the optical fiber plug is embedded into the ceramic bushing, the end face of the other end of the optical fiber plug is covered by the protective gasket, the metal case wraps the optical fiber plug, the protective gasket and the ceramic bushing in a necking mode to from a port directly connected with a standard FC optical fiber patch cord in an abutting mode, and the optical fiber plug is composed of a ceramic bar, an optical fiber embedded in the ceramic bar and a metal inner shell wrapping one end of the ceramic bar. According to the optical fiber energy transmitting sealing assembly used for the laser initiating explosive device, due to the fact that the optical fiber energy transmitting sealing assembly is lengthened, gas is prevented from leaking along the optical fiber; due to the fact that the structure is optimized, gas leakage due to the fact that a weak structure may become noneffective and crack under the high pressure condition is avoided; due to the design of the standard port, the laser initiating explosive device can be directly connected with the standard FC optical fiber patch cord in an abutting mode, and ignition and burning of explosive can be achieved smoothly by the laser initiating explosive device when the sealing pressure reaches hundreds of MPa or even several GPa.