The invention discloses a processing technology of needle-punched non-woven fabric. According to the processing technology of the needle-punched non-woven fabric, high-strength inflaming retarding polypropylene fibers and inflaming retarding polyester fibers are used as raw materials. The processing technology comprises the steps of unpacking, material mixing, opening, cotton feeding, carding, lapping, drafting, needle punching, hot rolling and coiling. According to the mode, professional equipment and adjustment are utilized for guaranteeing the uniformity and the thickness of lapping of the fibers, cloth with uniform longitudinal and transverse fiber networks is formed by accurate needle punching of three needle punching machines, and the formed non-woven fabric is soft in hand feel, high in strength, small in ductility, light in weight and resistant to abrasion, acid and alkali; due to the fact that stretching resistance and tearing resistance in the longitudinal direction and the transverse direction are improved greatly, the non-woven fabric is good in water washing and dry cleaning effect; meanwhile, due to the waterproof, fireproof, non-toxic and environment-friendly characteristics, the non-woven fabric is widely applicable to the fields of soft sofas, home decoration, car seats, interior trim and the like.