Cotton carding device

The utility model provides a cotton carding device which is free of blockage, high in efficiency, not prone to damage cotton fibers and good in stability. The cotton loosening machine comprises a cotton inlet, a first-stage cotton loosening mechanism, a cotton filtering device, a second-stage cotton loosening mechanism and a conveying belt which are arranged on a rack from top to bottom, the primary cotton loosening mechanism comprises two crossed comb tooth rows; each comb tooth row comprises a supporting rod and a plurality of parallel comb teeth fixed to the supporting rod, each comb tooth row is connected with one reciprocating mechanism, and when the two comb tooth rows are driven by the corresponding reciprocating mechanisms to reciprocate, the distance between the comb teeth on one comb tooth row and the comb teeth on the other adjacent comb tooth row is changed in a reciprocating mode; the secondary cotton loosening mechanism comprises two cotton opening rollers which rotate relatively, and card wires