The invention relates to a broken bridge aluminum alloy insulating flame-refractory window and an assembly method. According to the window, flameproof glass, a fiber reinforced calcium silicate flameproof glass gasket, a flame-refractory seal strip and a graphite-based intumescence flameproof bar, as well as multiple flame-refractory measurements, including filling the cavity of an aluminum alloy sectional material with flameproof gel and arranging a U-shaped glass clamp between window glass and a glass opening are adopted. The window has the beneficial effects that multiple technical measurements are adopted in conventional broken bridge aluminum alloy doors and windows, including the flameproof glass, the fiber reinforced calcium silicate flameproof glass gasket, the flame-refractory seal strip and the graphite-based intumescence flameproof bar, so that the flame refractory performance of broken bridge aluminum alloy doors and windows can be remarkably improved to achieve the flame refractory standard of 0.5 hour and 1 hour of related doors and windows; and the insulating performance, excellent appearance and other advantages of broken bridge aluminum alloy doors and windows can be maintained. The broken bridge aluminum alloy insulating flame-refractory window has an excellent development prospect.