Float glass manufacturing apparatus and manufacturing method thereof

The invention provides a float glass manufacturing apparatus and a manufacturing method thereof. The float glass manufacturing apparatus comprises a temperature adjusting apparatus between a forming apparatus and an annealing device for adjusting the temperature of a glass tape, wherein, the temperature adjusting apparatus comprises multiple heating units; the heating units comprises multiple heaters arranged in width direction of the glass belt so as to set the multiple heaters in width direction of the glass belt in the area of the heating units to control the heating units that take each area as the unit; two heating units of the multiple heating units are set opposite to each other in width direction of the glass belt separated by the glass belt and are set in the same position in convey direction of the glass belt; and the two heating units make at least one of the junctions of the areas at the upstream and the areas at the downstream staggered in width direction of the glass belt.