The invention discloses a vacuum microwave and low-frequency microwave combined uniform puffing method for crisp fish tablets, relates to vacuum microwave and low-frequency microwave combined uniform puffing technology with high thermal efficiency utilization rate, and belongs to the technical field of aquatic product processing. The method comprises the following steps of: cleaning a fresh fish serving as a raw material, removing fish bones, collecting the fish meat, chopping and mixing; adding auxiliary materials such as starch and the like according to a certain proportion, then continuously mixing, chopping and mixing; performing gel forming; and finally making recombined crisp fish tablets by using low-frequency microwave and the vacuum microwave combined uniform puffing. In the method, the novel convenient leisure food with high protein, low fat and rich nutrition is prepared from the fresh fish in the market, the fish tablets have excellent color, smell and taste, high crispness, low moisture content and long product storage period; the defects of high salt of the conventional dried fish and much oil of fried fish foods are overcome; and thus the fish tablets are healthy nutritional leisure food which is suitable for both children and adults. In the method, the auxiliary materials such as fish meat from which fish bones are removed, corn starch and the like are remixed, and the low-frequency microwave and vacuum microwave combined uniform puffing is adopted, so a new method is provided for processing the fish, the varieties of the fish meat products are enriched, and great economic benefit can be expectedly brought.