The invention relates to a preparation method of using near infrared light structure induced drawing to prepare a high strength polyamide fiber. The preparation method comprises following steps: carrying out in-situ polymerization between nano tungsten oxide/ferric sulfide and polyamide monomers (or blending nano tungsten oxide/ferric sulfide with polyamide monomers), carrying out melt-spinning toobtain modified polyamide fibers, performing secondary or multistage drawing, setting the temperatures of a first drawing roller and a second drawing roller to be the room temperature, and at the same time, and continuously irradiating fibers between the first drawing roller and the second drawing roller by near infrared light. The preparation method is simple and easy to perform, by precisely controlling the temperature of a fiber amorphous form area, the fibers are highly oriented; obtained melt-spun high strength polyamide fiber has a high mechanical strength, the breaking strength is 7.5to 12.5 cN/dtex, and the elongation at break is 15.0 to 19.0%.