The invention relates to the technical field of catalysts, in particular to an ammoxidation catalyst. Water glass is dissolved into deionized water, then the mixture is cooled and used for preparing silica gel, the content of the silica gel is enabled to be lower than metal content, the mixture is stirred and then sprayed and dried, and a finished product is obtained. The ammoxidation catalyst contains alkali metal, the load is higher, and the catalytic activity is also higher.