The present invention discloses a method for producing swelling soft granule compound feed, it is that removing the drying procedure from the producing method for swelling hard granule compound feed, and filling fish paste into additive in mixing procedure. The present invention aims at the current producing method for swelling hard granule compound feed to remove the drying procedure, makes the water content of swelling soft granule compound feed reach more than 22 percent, overcomes the defect of current swelling hard granule compound feed, decreases equipment investment and energy consumption, decreases the production cost; and the small trash fish are fully mixed with compound feed in the mixing machine after they are grinded into fish paste by the syrup grinder, fully using the nutrition and resource of trash fish, effectively avoiding the diseases, water pollution and resources waste result in feeding small fish directly.