ITG（INTELLGENT）basketless WB type heat treating durance is used for AI wheels heat treating. This furnace can charge the different size wheels in minimum interval automatically. The filling rate and production efficiency are highlu improved. The particular method of heating circulation air makes the workpieces have good performance of heating circulation air makes the workpieces have good performance of heating and soaking, effectively reducing the furnace length, the body surface decreases 25% compared with original mide. The electricity consumption is saved around 30%.