The invention relates to a heat accumulating type glass tank furnace with transverse flame, aiming to solve the problem that the glass tank furnace flame is easy to be short-passed and burns out the opposite wall. The heat accumulating type glass tank furnace comprises a melting tank, small furnaces, heat accumulating chambers, feeding ports, and discharging ports, wherein the ratio of the longitudinal length and transverse width of the melting tank is below 1, the small furnaces and the heat accumulating chambers are arranged at the two sides of the short edge of the melting tank, the feeding ports and the discharging ports are arranged at the two sides of the long edge of the melting tank, or the feeding ports are arranged at the two sides of the long edge of the melting tank and the discharging ports are arranged at the bottom surface of the melting tank. One or more parallelly arranged small furnaces and heat accumulating chambers are respectively arranged at the two sides of the short edge of the melting edge. The melting tank is a deepened vertical melting tank. The bottom of the melting tank is inclined towards the discharging ports. The inventive heat accumulating type glass tank furnace has the advantages of no short pass of flame, no wall burning out liability, prolonged service life, full play of heating function of flame, improved heat efficiency, convenient maintenance, high production efficiency, good quality of glass liquid, low energy consumption, and reduced emission.