two columns of oppositely disposed electrospinning nozzles with inner diameter of 0 8 mm respectively nanofibers exiting from the electrospinning nozzles were induced and drawn out by filament guiding roller pair 2 which is set at the end of pairs of electrospinning nozzles on the plane of the frame 3 the drawing speed of filament guiding roller pair 2 was 5 cm s and filament yarn of ha chitosan plla plga pu pcl composite nanofibers is obtained a device for electrospinning is used comprising frame 3 having three pairs of electrospinning nozzles 1 in two columns filament guiding roller pair 2 set at the end of pairs of electrospinning nozzles the frame 3 was set at angle of 0 u00b0 to fixed sticks 4 1 g hyaluronic acid ha mw 100 000 g mol was dissolved in 100 ml distilled water and the prepared solution was fed to one column of electrospinning nozzles containing 3 spinnerets 10 g poly l lactic acid plla m u03b7 100 000 g mol was dissolved in a mixed solvent of 50 ml acetone and 50 ml n n dimethyl formamide and the prepared solution was fed to the other column of electrospinning nozzles containing 3 spinnerets distance between two neighbouring electrospinning nozzles on the same column of frame is 10 cm and distance between two tips of oppositely disposed pair of electrospinning nozzles is 30 cm plane of frame 3 is set at angle of 0 u00b0 to fixed sticks 4 high dc voltages.