The invention discloses a method for obtaining a magnetostrictive material with the large magnetostrictive strain and a low driving field and the material. The method comprises the steps that the material is modified and is made to have a nano-martensitic domain, and the large magnetostrictive strain effect and the low driving field effect are met. The invention further discloses a preparation method for a polycrystal sample and a directional solidified sample of the magnetostrictive material with the large magnetostrictive strain and the low driving field, by the adoption of the method, the unique novel magnetostrictive material with the large magnetostrictive strain and the low driving field can be obtained, and the method is clear and definite, easy to implement, simple and practical. The preparation method has the beneficial effects of being simple in process, good in repeatability, high in production yield and the like; and the obtained Fe100-xPdx alloy has the small saturated magnetic field in performance, the saturated magnetic field is smaller than 1 kOe, the magnetostrictive performance is excellent, and the saturated magnetostrictive coefficient is larger than 300 ppm.