Mist blower power sprayer-duster is portable, flexible and high efficient equipment for plant protection. It is suitable for use in the prevention of plant disease and controlling pest in large plantation and crop field where cotton, wheat-paddy, fruits trees, tea trees etc. are planted. It can also be used for applying herbicide, sanitation and epidemic and prevention, spreading granular fertilizer. This machine can also be used in a mountainous area, hilly lands and odd places of land. The construction design of the machine is modern and unique.