The utility model relates to a fastening type J-typed hanging screen for a float glass melting furnace, which comprises an air-cooled hanging pillar (1) provided with a group of hanging hooks (3) anda splint (2), a group of fireproof bricks (5) hung on the hanging hooks are arranged on the splint (2) to form a vertical portion of the hanging screen, a bending part (a) is arranged at the lower endof the air-cooled hanging pillar and is provided with a group of fireproof bricks (6) to form a nasal part of the hanging screen. The fastening type J-typed hanging screen is characterized in that the fireproof bricks (6) at the nasal part are provided with blind mortises and grooves, the grooves and the tenons of two adjacent fireproof bricks (6) are correspondingly matched. The utility model has the advantages that the blind mortise fastening structure can effectively prevent the fireproof bricks from falling off due to the brittle fracture in the heating process, thus improving the servicelife of J-typed hanging screen.