The invention relates to the field of building door and window accessories, and particularly discloses a fire-resistant frame and sash connecting device. The fire-resistant frame and sash connecting device comprises a frame body hinge and a sash body hinge, and is characterized in that the frame body hinge is of a saddle type two-wing structure; the sash body hinge is axially fixed to the saddle portion in the middle of the frame body hinge; the sash body hinge and the frame body hinge are connected through a hinged shaft; two bearings are arranged between the frame body hinge and the sash body hinge; and riveted structures located at the upper end and the lower end of the hinged shaft are arranged at the axial opposite positions of the frame body hinge and the sash body hinge. The fire-resistant frame and sash connecting device is simple in structure, convenient to use, reasonable in design and flexible in application, is applied to aluminum alloy European standard sections and is suitable for manufacturing fire-resistant window hardware.