NOVELTY - Methanol solution of element nitrate (10-25) and methanol solution of diamino-diphenyl sulfone (10-25) are respectively mixed with one or more of normal octane, isooctane, normal heptane and isoheptane (60-70), one or more of normal butanol, isobutyl alcohol and normal propyl alcohol (0-10), one or more of fatty alcohol-polyoxyethylene ether, polyethylene glycol sorbitan monostearate and sorbitan oleate (5-15), to obtain nonaqueous micro-emulsions (A,B). The emulsions (A,B) are mixed and stirred in presence of oxygen to obtain compound nanometer additive.    USE - Manufacture of compound nanometer additive for methanol gasoline (claimed).    ADVANTAGE - The methanol gasoline formed using compound nanometer additive reduces exhaust emission of formaldehyde during combustion.    DETAILED DESCRIPTION - Nitrate (in mass%) (0-40) of one or more of zirconium, lanthanum, molybdenum, nickel, copper, manganese and zinc and cerous nitrate (60-100) are dissolved in methanol. Methanol solution of element nitrate with concentration of 0.0001-0.5 mol/L is obtained. One or more of normal octane, isooctane, normal heptane and isoheptane (60-70), one or more of normal butanol, isobutyl alcohol and normal propyl alcohol (0-10), one or more of fatty alcohol-polyoxyethylene ether, Tween 60 (RTM: polyethylene glycol sorbitan monostearate) and span 80 (RTM: sorbitan oleate) (5-15), and methanol solution of element nitrate (10-25) are mixed at normal temperature to obtain clear and transparent nonaqueous micro-emulsion (A). One or more of normal octane, isooctane, normal heptane and isoheptane (60-70), one or more of normal butanol, isobutyl alcohol and normal propyl alcohol (0-10), one or more of fatty alcohol-polyoxyethylene ether, polyethylene glycol sorbitan monostearate and sorbitan oleate (5-15) and methanol solution of diamino-diphenyl sulfone (10-25) with concentration of 0.004-2 mol/L are mixed at normal temperature to form clear and transparent nonaqueous micro-emulsion (B). The nonaqueous micro emulsions (A,B) are mixed in volume ratio of 1:1 at 12-40 degrees C and stirred for 60-150 minutes. Oxygen is supplied into obtained mixture at speed of 0.1-0.6 L/min for 20-120 hours to obtain compound nanometer additive.