NOVELTY - Preparing car methanol fuel refined gasoline comprises: e.g. (i) pre-heating the raw material by a condensation cooling pre-heater (I) and mixing the auxiliary materials in a mixer and mixing, refluxing the mixed solution by a shell of the cooling pre-heater (II), generating and passing the substances with lower boiling point through an air-material outlet and performing cross flow heat exchange in the condensation liquid with methanol and cooling; and (ii) configuring the modified methanol and mixing the configured modified methanol with e.g. straight-run gasoline to obtain the product.    USE - The method is useful for preparing car methanol fuel refined gasoline.    ADVANTAGE - The method: recovers and uses the waste heat of the reaction by integrating condensation, cooling and raw-material pre-heating in a single device, is simple, convenient and environmental friendly, utilizes a catalytic reactor, which uses far-infrared radiation anti-explosion type heater, thus saving the energy.    DETAILED DESCRIPTION - Preparing car methanol fuel refined gasoline comprises: (i) providing (in wt.%) methanol as raw material (85), and naphtha (5), petrobenzene (3), isobutene (1-3), isopropropanol (1), isobutylaldehyde (1-3), sec-octyl alcohol (0.5), tertiary butanol (0.5), methylvinylketone (0.5), acetylacetone (0.3) and phenylbutyrate ketene (0.2) (as auxiliary materials), (a) pre-heating the raw material at 55-65 degrees C by a condensation cooling pre-heater (I) and mixing the auxiliary materials in a mixer to pre-heat at 45-55 degrees C by a cooling pre-heater (II), (b) mixing the pre-heated mixed solution of methanol and the auxiliary materials by a main-auxiliary mixer, inputting in a catalytic reactor at an air speed of 4-6/h, further heating the mixture by a far-infrared radiation heating device at the bottom part of the catalytic reactor at 70-80 degrees C, counter-currenting by an air distribution device in the catalytic reactor after vaporization and performing methanol modified reaction by a catalytic reaction section of molecular sieve fixed bed catalytic reactor to generate a mixed product of alcohol, ether, hydrocarbon compound to reach the top section of the fixed bed catalytic reaction temperature 60-65 degrees C, refluxing the mixed solution by a shell of the cooling pre-heater (II) at 60-50 degrees C to enter into a lower-temperature cooling pot (7) to continuously cool to the environmental temperature, where the above step does not take part in the reaction through the catalytic reaction section of molecular sieve fixed bed in the catalytic reactor, which comprises the substances with high boiling point of methanol, isopropanol and benzene, which are sent to the top part of the catalytic reactor, where the inner wall at the top part of the catalytic reactor is present in an annular liquid material collection pad welded at the lower edge of the inner wall of the machine top, reducing the temperature for first condensation, flowing into a condensation-liquid outlet and entering into a pipe of the cooling pre-heater (II), (c) generating the substances with lower boiling point of isobutylaldehyde, dimethoxymethane and methyl tertiary butyl ether by reacting isobutene and methanol in the above step, passing the substances with lower boiling point through an air-material outlet at the top end of the air catalytic reactor to enter into the shell of the condensation cooling pre-heater I to be condensed by the refluxed methanol in the pipe of the condensation cooling re-heater I, continuously performing cross flow heat exchange in the condensation liquid with methanol, cooling the condensation liquid to higher than the environmental temperature of 5-10 degrees C by methanol, introducing the condensation liquid into a lower-temperature receiving pot to mix with the reaction products of the step (b) in the lower-temperature receiving pot, continuously cooling to the environmental temperature, where the mixed cooling liquid of the reaction product in the step (b) and the reaction production in this step is the modified methanol; and (ii) configuring the modified methanol and adding the following configuration auxiliary materials in the obtained modified methanol, where the wt.% of the auxiliary materials are: isobutanol (2), acetone (1), zinc dialkyl dithiophosphate (0.04), 2, 6-di-tert-butyl- para-cresol (0.04) and polyisobutylene-based amide-ethylhexyl ester (0.02), and mixing the configured modified methanol with straight-run gasoline or 90# gasoline (30-100wt.%) to obtain the product. An INDEPENDENT CLAIM is also included for a device for preparing the car methanol fuel refined gasoline, comprising: an auxiliary-material mixer, a main-material mixture, a catalytic reactor, a condensation cooling pre-heater (I), a cooling pre-heater (II), a lower-temperature cooler and a receiving pot. The auxiliary-material mixer and the main-material mixture are pipe form mixers. The heating catalytic reactor is a pot type container with an oval sealing head, where the pot bottom is a heating section. The heating section is provided with a feed pipe connection port for reflux feeding. A far-infrared radiation heating device is arranged on the external wall of the heating section. A grid air-flow distributor is arranged at the upper part of the heating section. A catalytic reaction section of molecular sieve fixed bed is mounted at the upper part of the distributor. The pot top is arranged at the upper part of the reaction section. A condensation-liquid collection pad, a condensation-liquid outlet and a gas material outlet are arranged at the pot top. The condensation-liquid outlet and the gas material outlet are respectively connected with the condensation cooling pre-heater (I) and the cooling pre-heater (II). The condensation cooling pre-heater (I) and the cooling pre-heater (II) are the tube type heat exchangers. The lower-temperature cooler employs a cooling pad pipe, which is placed in the receiving pot. The feed connection port, the air-flow distributor, the catalytic reaction section and the discharging mouth are provided with a temperature displaying device and an electrical heating warm type temperature-controlling device.