Primary-secondary vacuum cup

The invention discloses a primary-secondary vacuum cup, which belongs to the field of daily necessities, and mainly solves the problem that students cannot be supplemented with water in time because boiled water in vacuum cups is too hot. The primary-secondary vacuum cup structurally comprises a primary cup and a primary cup cover, wherein a secondary cup is arranged on the outer wall of the primary cup and close to the rim of the cup; a secondary cup cover is arranged on the secondary cup; and the rims of the primary and secondary cups are level to each other and are communicated with each other. When the primary-secondary vacuum cup disclosed by the invention is put into use, water in the secondary cup is cooled fast, therefore, a student can drink drinkable warm water immediately only by mixing the water in the primary cup with the water in the secondary cup, and the process is rapid and convenient.