The invention discloses a method for preparing natural rubber with high property and thermo-oxidative aging-resistant property. The method comprises the following steps of mixing an anti-aging agent,a dispersing agent and water, grinding, and mixing with latex; highly dispersing the anti-aging agent dispersant into fresh latex by an emulsion compounding method, and enabling rubber particles and anti-aging agent particles to generate a good contact surface; adding acid, and solidifying, so as to obtain a natural rubber/anti-aging agent solidifying rubber sample; improving the drying treatment(temperature gradient change) and dewatering treatment technologies, and effectively reducing the oxidization of the natural rubber during primary processing, so as to prepare the natural rubber withhigh property and aging-resistant property. The PRI (plasticity retention index) of the natural rubber can reach 98%; after the natural rubber is processed into vulcanized rubber, the stress at 300% definite elongation can reach 2.30MPa, the tensile strength can reach 29.11MPa, the elongation rate at break can reach 820%, and the physical property is obviously enhanced; the retention rate of tensile strength and the elongation rate at break of the vulcanized rate are obviously improved.