CRF grain drying diagonal flow fan with high temperature resistance is a new type of optimal design and high-tech fan, which is similar between axial fan and centrifugal fan. The fan is made of cylindrical housing and three flanges. The outlet and inlet follow the air by connecting a pipe network. The inlet wind collector is made of gradually shrinking streamline form and a sound-absorbing plate.The outlet has a pre-rotation vane, whose gas has a good air flow-distribution and a stable pressure resistance. Thanks to the new design of the meridian acceleration, the pressure is higher than axial fan and the air volume is larger than centrifugal fan. It features high efficiency, low noise, compact dimensions and convenient installation. This fan has obtained national patent for utility model and the patent number is ZL201320208067.5 and has applied for invention patent. CRF grain drying diagonal flow fan with high temperature resistance is widely used in baking grains, other agricultural, food, industrial, mining enterprises, hotels, restaurants, museums, gymnasiums, high-rise building for ventilation.