The invention discloses a telescopic 
wind power generation 
tower barrel inner wall sandblast cleaning 
machine, and relates to the field of mechanical manufacturing industry. The 
machine comprises a base, a telescopic supporting arm mechanism, a 
machine head driving mechanism and a 
sand blasting machine head mechanism; the telescopic supporting arm mechanism comprises a fixing shell, and a moving telescopic arm; the machine head driving mechanism comprises a hydraulic supporting rod, a fixing shaft, a bearing, a wheel stand, a rotating shaft, a driving wheel, a driving motor, a driving harmonicspeed reducing device, a steering adjusting motor, a steering 
harmonic speed reducing device and a connecting shaft; and the 
sand blasting machine head mechanism comprises a telescopic outer cover, awaste 
barrel cover, a 
barrel cover pressing bolt, a waste barrel body, a partition plate, a main 
hydraulic cylinder, a hydraulic telescopic rod, a supporting piece, a sand hopper, a sand feeding 
pipe, a high-pressure air source, a 
nozzle, an air feeding 
pipe and an air inlet 
nozzle. The design scheme of the machine is suitable for 
wind power generation 
tower barrel inner wall 
sand blasting process, the 
structural reliability is high, the 
automation degree is high, the efficiency of 
wind power generation 
tower barrel inner wall sand blasting is greatly improved, and the production cost is reduced.