Unpowered dust collector

The utility model belongs to a dust collector, in particular to an unpowered dust collector. The dust collector consists of a material circulation guide chute, a dust collection pressurized chamber, a rotary pressure reduction pipe, a secondary pressure reduction chamber, a dust filtration chamber and turning rotators, wherein the lower part of the material circulation guide chute adopts an arc end surface structure, the material circulation guide chute is connected with the dust collection pressurized chamber, the upper end of the dust collection pressurized chamber is communicated with the material circulation guide chute through the rotary pressure reduction pipe, the secondary pressure reduction chamber is communicated with the dust collection pressurized chamber, the secondary pressure reduction chamber and the dust collection pressurized chamber are provided inside with the turning rotators, and the dust filtration chamber is arranged between the secondary pressure reduction chamber and the dust collect