The invention provides a light gasoline hydrocarbon recombination etherification catalytic rectification process and a device thereof. With the light gasoline hydrocarbon recombination etherification catalytic rectification process provided by the invention, a method combining hydrocarbon recombination and catalytic rectification is adopted; C5 olefins and C6 olefins are introduced from positions with different heights in the reaction section of a catalytic rectification tower, thereby realizing contact with a catalyst in a same reaction section; meanwhile, methanol is introduced into the catalytic rectification tower from two positions with different heights in the reaction section. The invention also provides a light gasoline hydrocarbon recombination etherification catalytic rectification device used for realizing the above-mentioned process. The light gasoline hydrocarbon recombination etherification catalytic rectification process provided by the invention has the advantages of less investment, simple operation, low energy consumption and high olefin etherification conversion rate.