This study was carried out to reveal lycopene extract and nano-lycopene as a natural antioxidant and its role in prolonging the shelf life of flax seed oil, which contains a high percentage of polyunsaturated fatty acids, which makes it more susceptible to oxidation. Lycopene was extracted using a solvent mixture of acetone, hexane, and ethyl alcohol at a ratio of (1:2: 1) from tomato waste powder, the lycopene pigment was identified using a high-performance liquid chromatography (HPLC) device, lycopene nanoparticles were synthesized from the extracted lycopene by mechanical grinding, and the lycopene nanoparticles were identified to determine their surface morphology using a scanning electron microscope (SEM) its dimensions reached 62 nanometers, and an atomic force microscope (AFM) was used to determine its surface shape and determine the dimensions and roughness of the lycopene nanoparticles, which reached 45.62 nanometers. The average crystal size was calculated using XRD technology and amounted to 12.52 nanometers, and the results showed that adding nano-lycopene at a concentration of 150. 200 and 250 ppm led to extending the shelf life of flax seed oil to more than 60 days, at room temperature (25 ± 2) °C, while the control sample was considered rancid after 30 days, the results of our study indicated the presence of antioxidant properties for both Lycopene and nano-lycopene, variables that indicate the development of oxidation processes were followed through indicators of both the percentage of free fatty acids (FFA) and the peroxide number (PV) during the storage period.