The invention discloses a dedusting kneading device for tea leaf processing. The dedusting kneading device comprises a mounting frame, a drying drum and a main kneading device body; a feed inlet is formed in the upper end of the main kneading device body, a fourth rotary motor is arranged at one side of the feed inlet, a sifting rotating shaft is arranged at the lower end of the fourth rotary motor, and a sifting net is arranged at one side of the sifting rotating shaft; a first electromagnetic valve outlet is formed in the lower end of the sifting net, a waste discharging slant plate is arranged at one side of the first electromagnetic valve outlet, and a funnel is arranged at the lower end of the waste discharging slant plate; the mounting frame is arranged at the lower end of the funnel, several first slide blocks are arranged at the lower end of the mounting frame, first slide rails are arranged at the lower ends of the first slide blocks, and several idler wheels are arranged at one sides of the first slide rails. Through the fourth rotary motor, the sifting rotating shaft is driven to stir tea leaves, so that through through holes in the surface of the sifting net, impuritiessuch as dust are sifted out, the cleanliness of the tea leaves is improved, and the quality of the tea leaves is improved.