The invention relates to a catalyst for producing ethyl orthosilicate by a silicon powder method and a preparation method thereof. The catalyst comprises the following components in percentage by weight: 20%-50% of cuprous oxide, 10%-40% of copper oxide, 10%-40% of copper powder and 10%-30% of catalyst carrier. The preparation method comprises the following steps of: uniformly mixing the active components such as cuprous oxide, copper oxide and copper powder according to the composition of the catalyst; preparing a 30-40% alcohol or aqueous solution of the catalyst carrier; and adding the mixed active components in the alcohol solution of the catalyst carrier, stirring for 1-2 hours, then dripping a small amount of distilled water, continuously stirring for 1-24 hours, and then filtering,thus obtaining filter residue; and drying the filter residue at the temperature of 70-120 DEG C, and roasting for 8-24 hours with air isolation at the temperature of 400-700 DEG C, thus obtaining thecatalyst. The catalyst has the characteristics of high activity and stability, long service life and capability of being utilized repeatedly for multiple times.