The invention discloses a hot-
air drying machine capable of utilizing 
waste heat and achieving penetrating countercurrent 
fluidization. The upper portion of a 
drying tower is connected with an induced draft fan, and the induced draft fan is connected with a 
cyclone dust removing 
waste heat efficient recoverer formed by a tube-type 
heat exchanger and a 
cyclone dust collector in an overlapped manner in the tangent direction and then is emptied; the air inlet end of the shell side of the tube-type 
heat exchanger is communicated with the 
atmosphere, and the air outlet end of the shell side of the tube-type 
heat exchanger is connected with the lower portion of the 
drying tower through an 
air blower and a steam finned heater; and an 
impeller of the induced draft fan is of a structure that blades are in a hollow and wedged shape, and the 
contour line of the appearance of the induced draft fan is an 
involute. According to the hot-
air drying machine capable of utilizing the 
waste heat and achieving the penetrating countercurrent 
fluidization, creative integration is conducted on waste heat utilization and dust removal, the 
cyclone dust removing waste heat efficient recoverer is designed out, the equipment input is reduced, and the work efficiency is improved; and due to the fact that 
sieve mesh cone covers, 
sieve mesh cone discs, discharging tubes, a stretching 
vibration transmission shaft and conical plugs are arranged, penetrating, countercurrent, boiling and 
fluidization drying of materials are exquisitely and perfectly achieved, more energy is saved, the drying quality is higher, the 
power consumption of the induced draft fan is lower, and the application prospect is wider.