A hydrogenation-acid catalysis bifunctional catalyst, based on the mass of the catalyst, containing 80-99.8% of a silica-alumina molecular sieve component, 0.2-2% of a metal component with hydrogenation activity supported on the molecular sieve, and 0-20% of a hydrocarbyl modifying component, wherein the hydrogenation active metal is selected from ruthenium, platinum, palladium, copper, nickel, or a combination thereof, more preferably selected from ruthenium, palladium, or a combination thereof, the hydrocarbyl modifying component is a C1-20 hydrocarbyl, preferably a C1-10 hydrocarbyl, more preferably selected from methyl, ethyl, propyl, isopropyl, butyl, phenyl, benzyl, phenethyl, or a combination thereof.