Sinking extruded granular feed of penaeus uannamei and preparation method thereof

The invention discloses sinking extruded granular feed of penaeus uannamei. The density of the sinking extruded granular feed is more than 1.03, and the curing degree is 100 percent. Brown fishmeal, squid liver paste, shrimp shell meal, flour, not-genetically-modified soybean meal, canola meal, peanut meal, cassava block, mineral gunk, vitamin gunk, calcium dihydrogen phosphate, fish oil, calcium propionate, phospholipids oil and DDGS are adopted as raw materials, the feed base stock which is proportioned by weight part is regulated for 160 to 200 seconds by a double-shaft extruding full-curing bulking machine under the conditions that the steam pressure is 0.4 to 0.5MPa, the moisture is 19 to 23 percent and the temperature is 85 to 90 DEG C, and then is cured at a curing temperature of 135 DEG C, the cavity pressure of 3MPa and the curing time of 90 to 120 seconds. The sinking extruded granular feed has fewer animal raw materials and has low feed coefficient which is less than or equal to 1.1. All anti-nutrient factors in the feed are completely destroyed, the stability in the water is more than 12 hours, and the feed is completely cured.