NOVELTY - Conversion of normal paraffin to isoparaffin comprises pre-treating a high silicon zeolite carrier; preparing a gold-loaded catalyst by performing negative pressure degassing purification treatment to the pretreated hydrogen zeolite at 20-90 degrees C and - 0.01 to - 0.1 MPa for 0.5-12 hours, contacting a gold precursor and the carrier, adding a precipitator, washing by deionized water, drying at 80-200 degrees C for 0.5-100 hours, and calcining at 300-700 degrees C for 3-20 hours; and performing isomerization to normal paraffin on a fixed bed reactor at 150-600 degrees C and 0.3-3.0 MPa at 0.5-20/hour.    USE - Method for the conversion of normal paraffin to isoparaffin (claimed).    DETAILED DESCRIPTION - Conversion of normal paraffin to isoparaffin comprises:    (A) pre-treating a high silicon zeolite carrier by performing high silicon zeolite carrier calcining treatment at 400-600 degrees C for 3-8 hours, where the ratio of silicon to aluminum of the high silicon zeolite is greater than 10, and the particle size of the zeolite is 5 nm to 30 mu m; performing ammonia exchange treatment by performing ion exchange to calcined zeolite at 20-80 degrees C for 0.2-100 hours at 1-5 times, using 0.0.5-1 mol/L ammonium nitrate, ammonium chloride, or ammonium carbonate solution, where the solid-liquid volume ratio of ammonium salt solution to zeolite is 3:1-10:1, and controlling the content of sodium ion to less than 1%; washing by deionized water, drying at 80-200 degrees C for 1-100 hours, and calcining at 400-600 degrees C for 3-8 hours to obtain hydrogen zeolite; and performing acid chambering treatment of the hydrogen zeolite by 0.05-6 mol/L hydrochloric acid, nitric acid, sulfuric acid, or citric acid solution at 20-80 degrees C for 1-5 hours, washing with deionized water to be neutral, drying at 50-200 degrees C for 3-20 hours, and calcining at 300-600 degrees C for 1-4 hours to obtain a carrier, where the solid-liquid volume ratio of acid solution to zeolite is 3:1-10:1;    (B) preparing a gold-loaded catalyst by performing negative pressure degassing purification treatment to the pretreated hydrogen zeolite at 20-90 degrees C and - 0.01 to - 0.1 MPa for 0.5-12 hours; keeping the temperature and the negative pressure condition while stirring, contacting a gold precursor and the carrier, adding a precipitator in the mixture to load the gold by negative pressure deposition precipitation, where the reaction time is 5-100 hours; and after-treating the gold-loaded sediment by separating solid and liquid, washing by deionized water until there are no chloride ions left, drying at 80-200 degrees C for 0.5-100 hours, and calcining the solid matter at 300-700 degrees C for 3-20 hours; and    (C) performing isomerization to normal paraffin on a fixed bed reactor, where the catalyst adopts regular band extrusion molding, at 150-600 degrees C and 0.3-3.0 MPa at 0.5-20/hour; performing isomerization to normal paraffin on a movable bed reactor, where the catalyst adopts regular abrasive small ball, at 150-600 degrees C and 0.1-0.5 MPa at 0.5-20/hour; and performing isomerization to normal paraffin on a fluidized bed reactor, where the catalyst adopts atomizing granulation molding and has a grain size of 20-120 mu m, at 150-600 degrees C and 0.1-0.3 MPa.