The invention provides a method for producing dacron FDY (Fully Drawn Yarn) filaments in large scale by utilizing recycled PET (Poly Ethylene Terephthalate) bottle chips. The method comprises the following steps: crushing recycled PET bottles into chips; cleaning and then drying; feeding the chips into a crystallizing bed so as to crystallize, and then drying; pouring the dried bottle chips into a screw extruder for performing fusion extrusion; causing the filtered flux to enter into a homogenizing kettle and performing condensation polymerization for 1.4-1.5 hours, thereby homogenizing the flux in the homogenizing kettle; causing the homogenized flux to enter into a spinning box; and spinning according to a high-speed spinning technology, thereby obtaining the dacron FDY filaments. A homogenizing step is added in the producing method, so that the problems of big viscosity fluctuation and inferior stability of the flux of the PET bottle chips are solved, and the continuous and large-scale production of the FDY filament products by taking the recycled PET bottle chips as raw materials is realized.