The invention relates to a method for preparation of oxide-polymetallic catalysts containing platinum-group metals for steam-oxidative conversion to obtain carbon monoxide and hydrogen. The method comprises treatment of NiO and CO3O4 by solutions of Al, Ce, Zr nitrates and palladium (Pd(NH3)4Cl2), platinum (H2[PtCl6]·6H2O) and rhodium (H3[RhCl6]) compounds followed by drying, carbonization of the obtained material in a methane flow at 550° C., preparation of slurry from this material, pseudo-boehmite and tetraisopropoxysilane, filling foam nichrome pores with obtained material suspension, elimination of water at 80° C., calcinating during 3 hours in an atmosphere of argon at 1300° C., elimination of carbon by water vapors at 600° C. during 3 hours. The technical result is development of a highly efficient heterogeneous catalyst. 3 material claims, 7 tables, 4 examples.