The invention provides a glass heating furnace which comprises a shell body, and heating devices and a conveying device which are arranged in the shell body; the conveying device comprises a first gas bed device and a guide driving device; the first gas device comprises a permeable base and a first gas circulating mechanism; the guide driving device comprises a plurality of guide rollers and a guide roller driving device; the permeable base inclines downwards in a manner of being perpendicular to the motion direction of a to-be-treated glass plate; the guide rollers are arranged in low points. A conveying device in a glass heating furnace in the prior art is optimized, and a structure of gas pore units arranged on the permeable base and used for forming a gas bed is optimized, so that the gas bed structure is more reasonable, the glass plate stress is more uniform, and the defect that the middle of the glass plate has embossing or waves because of different gas pressures of parts of the gas bed in the prior art is avoided.