The invention belongs to catalyst technique field, concretely relates to a preparation method of catalyst for copper-zinc-aluminum gas phase aldehyde hydrogenation and product thereof, which solves the problems in existing technique that the preparation process of aldehyde hydrogenation catalyst is complex, repeatability is bad, catalyst crystal-size is heterogeneous, dispersion degree of active copper is not high, mechanical strength is small, selectivity to product is bad, especially when rising reactive temperature to enhancing reactive speed and heat energy efficiency, activity, selectivity and stability are bad. The method modifies the intermittent feeding mode to continuous feeding mode by step continuous coprecipitation method, specific surface and pore volume of catalyst is large, dispersion degree of active metal is high, catalytic activity is good, selective and stability have more improvement, and side reaction of esterification and etherification is reduced.