TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Method: The high-pressure organic colloidal method comprises adding the complexing agent into the polyalcohol reductant solution or the mixed solution of the polyalcohol reductant solution with the water, performing the ultrasonic treatment and agitating for dissolving the complexing agent completely, and then adding chloroplatinic acid, performing the ultrasonic treatment, agitating and uniformly mixing and then adding obtained catalyst precursor, agitating and performing the ultrasonic treatment to disperse uniformly, adjusting the pH to 8-10 by the alkaline solution with the mass concentration of 5-10% and then placing the solution into the autoclave to react for 4-12 hours at 100-160 degrees C, after finishing the reaction, cooling the autoclave to room temperature and then using the diluted aqueous nitric acid solution with the mass concentration of 5-10% to adjust the pH of the reaction system to 4-6, washing the solution by the secondary water till there is no chloride ions in the filtrate, drying the obtained filter cake in vacuum at 60-80 degrees C to achieve the constant weight to obtain the core-shell catalyst, where the complexing agent is the sodium citrate, the citric acid or the disodium ethylenediamine tetraacetate, the molar ratio of the complexing agent to the chloroplatinic acid is 2:1-2.5:1, the polyalcohol reductant is the ethylene glycol, the isopropyl alcohol, the glycerin or the n-butyl alcohol, and the molar ratio of the polyalcohol reductant to the chloroplatinic acid is 1:1-1:10. The microwave method comprises adding the complexing agent into the polyalcohol reductant solution or the mixed solution of the polyalcohol reductant solution with the water, performing the ultrasonic treatment and the agitating for dissolving the complexing agent completely, and then adding the chloroplatinic acid, performing the ultrasonic treatment, agitating and uniformly mixing and then adding obtained catalyst precursor, agitating and performing the ultrasonic treatment to disperse uniformly, adjusting the pH to 8-10 by the alkaline solution with the mass concentration of 5-10% and then placing the solution into a microwave oven to react for 1-2 minutes, after finishing the reaction, cooling the reaction system to room temperature and then washing by the secondary water till there is no chloride ions in the filtrate, drying the obtained filter cake in vacuum at 60-80 degrees C to achieve the constant weight to obtain the core-shell catalyst, where the complexing agent is the sodium citrate, the citric acid or the disodium ethylenediamine tetraacetate, the molar ratio of the complexing agent to the chloroplatinic acid is 2:1-2.5:1, the polyalcohol reductant is the ethylene glycol, the isopropyl alcohol, the glycerin or the n-butyl alcohol, and the molar ratio of the polyalcohol reductant to the chloroplatinic acid is 1:1-1:10. The electrode position method comprises uniformly dispersing the catalyst precursor into ethanol solution of polytetrafluoroethylene, agitating to form ink-like solution and then uniformly coating the ink-like solution onto a glassy carbon electrode and drying under an infrared lamp, using electrolytic solution containing a platinum precursor as electrolyte, using a three-electrode system, using the glassy carbon electrode coated by the ink-like solution as a working electrode, using a platinum wire and silver/silver chloride electrode as a counter electrode and a reference electrode respectively to prepare the core-shell catalyst, where the mass of the platinum in the platinum precursor is 1-5% of the total mass of the catalyst in the catalyst precursor. In the electrodeposition method, adding the ethylene glycol, lead acetate, the citric acid, the sodium citrate or hexadecyl trimethyl ammonium bromide into the electrolyte. The electrode position method comprises cyclic voltammetry, constant-current impulse deposition, constant-potential impulse deposition, constant-current continuous deposition or intermittent current deposition. The impregnation reduction method comprises adding the complexing agent into ethanol solution or the mixed solution of the ethanol solution with the water, performing the ultrasonic treatment and the agitating dissolving the complexing agent completely, and then adding the chloroplatinic acid, performing the ultrasonic treatment, agitating and mixing uniformly and then adding obtained catalyst precursor, agitating and performing the ultrasonic treatment to disperse uniformly, removing residual ethanol and then drying and grinding obtained solid substance, reducing for 2-4 hours at 100-180 degrees C in hydrogen to obtain the core-shell catalyst. The complexing agent is the sodium citrate, the citric acid or the disodium ethylenediamine tetraacetate. Preferred Components: The carbon carrier is Vulcan XC-72 (RTM: Carbon black or carbon nanotube). The platinum precursor is the chloroplatinic acid or tetraammineplatinum dichloride, and the pH of the electrolytic solution is 3-6.