A catalyst for normal-pressure dehydrogenation of 1,4-butanediol to prepare gamma-butyrolactoneby and a preparation method thereof relates to a catalyst for preparing the gamma-butyrolactoneby and a preparation method of the catalyst. The catalyst is composed of copper oxide, chromic oxide and nanometer titanium dioxide. The preparation method is a deposition precipitation method and uses copper nitrate hydrate, chromic nitrate nonahydrate and nanometer titanium dioxide as raw materials and natrium carbonicum calcinatum or ammonia water as a precipitation agent. A nitrate mixed solution, a precipitation agent solution and nanometer titanium dioxide suspension liquid are prepared, and deposition precipitation, aging, washing, suction filter, drying and roasting are performed to obtain copper chromium titanium catalyst products. The products produced in the method is simple in composition, low in chromium content, high in specific surface area, good in activity and stability and low in catalytic activity pressure. The catalyst is applied to the normal-pressure dehydrogenation of the 1,4-butanediol to prepare the gamma-butyrolactoneby, so that the conversion rate of 1,4-butanediol is stably more than 99.8%, and selectivity of gamma-butyrolactoneby is more than 97%.