The invention discloses a preparation process for a rigid polyurethane foam material filled in a novel fuel transportation container, which comprises the following steps of: 1, uniformly mixing polyether polyol, a flame retardant, a foaming agent, a catalyst and a defoaming agent, and heating to obtain a material A; heating the polyisocyanate to obtain a material B; 2, mixing the material A and the material B, and carrying out free foaming; 3, presetting the density of the foam material in each cavity to be rho, providing the rigid polyurethane foam material with the density of rho into the cavity of the novel fuel transportation container, and curing to complete the filling of the rigid polyurethane foam material. According to the invention, the requirements of filling hard polyurethane foam performance at different parts of the novel fuel transportation container are met, the integral buffering and heat resistance of the novel fuel transportation container can be improved, the deformation of the transportation container caused by overlarge heating expansion rate is effectively avoided, the safety requirements of the novel fuel transportation container under normal transportationworking conditions and accident transportation working conditions can be met, and the service life of the novel fuel transportation container is guaranteed.