The invention discloses an optical cable protection tube port sealing support frame and belongs to the technical field of optical fiber communication equipment. The optical cable protection tube end sealing support frame is composed of an upper fracture cushion and two lower halves of a support frame . Crescent plates of the two halves of the support frame are connected with a D-shaped ring through connection pillars and fire-proof mud is filled between the crescent plates and the D-shaped ring. The sealing support frame enables the fire-proof mud to be tightly filled, in addition, the integrity of the fire-proof mud is durable, the fire-proof mud is not prone to scatter and fall. The optical cable protection tube end sealing support frame is used for sealing a port of a communication optical cable home-entry protection tube.