The invention relates to ultrashort fine and soft fiber poly wool yarn and a production method thereof, and belongs to the field of spinning. According to the ultrashort fine and soft fiber poly wool yarn and the production method thereof, pretreatment of increasing proportion through a intermediate-temperature oxygen bleaching method is conducted to ultrashort fine soft kapok fiber, organic cotton fiber and the like, the problem that the fiber floats during opening and carding is solved, and the performance characteristics of the ultrashort fine soft kapok fiber and the organic cotton fiber is not influenced. Cotton carding process is conducted through a small-proportion mixing technique in which Australian wool top, organic cotton and kapok fiber are mixed in rolling layers, and a uniform blending bar is obtained. After a second drawing and roving process, the yarn is spun through a poly wool spinning technique on a spinning machine, the ultrashort fine and soft fiber poly wool yarn of the organic cotton fiber or the kapok fiber or noil fiber is manufactured after a meridian tube process, wherein the Ntex of the ultrashort fine and soft fiber poly wool yarn is 9.7-28 tex. By means of the ultrashort fine and soft fiber poly wool yarn spinning technique adopted in a cotton spinning system, partial technical problem that kapok, cashmere and combing noil are spun into yarn difficultly in cotton spinning equipment is solved, and medium high yarn which is good in yarn levelness, high in strength, compact in structure, bright and clean and good in wear-resisting property and has little hairiness is obtained.