The invention discloses an air spinning method for soybean fibres. The air spinning method for soybean fibres includes the following steps: dissolving the soybean cellulose into mixed solution from minus 15 to minus10 DEG C of sodium hydroxide and urea to prepare jet fluid, spinning the soybean cellulose into soybean fibres with a wet spinning mode, and spinning the soybean fibres to spin into yarn through converging, twisting, drawing and winding. The air spinning method for soybean fibres has the advantages that under the condition of a degree of twist, and softness of yarn feel can be kept.