The invention discloses a 
disease prevention and detoxification feed for fish and shrimps in 
fresh water, and a preparation method of the feed. The feed is prepared from the following raw materials: 
corn flour, wheat 
bran, fermented 
blood meal, an 
antidote and the like. The feed is capable of effectively removing harmful toxins such as 
escherichia coli, intestinal toxins, heavy 
metal ions and the like in the bodies of the fish and the shrimps by absorption, thus having the functions of epidemic prevention, cure of diseases, disinsection and sterilization; the feed is also capable of providing trace elements which are necessary for the growth of the fish and the shrimps, promoting the 
metabolism of organisms, improving the 
feed conversion ratio, promoting the fish and the shrimps to have strong 
appetite and promoting growth and 
weight gain. The feed is a puffed product, and the 
antidote has strong absorption and detoxification functions, so that the feed can be used for purifying the water in a 
pool, improving the breathability of the water in the 
pool and increasing the dissolved 
oxygen of the water. Furthermore, Indian bread 
cyrtomium rhizome, fineleaf 
schizonepeta herb, 
coptis root, rhubarb and baikal skullcap root which are fed into the feed also have good functions of 
antibiosis and disinsection, and are capable of improving the 
efficacy and thoroughly controlling after being matched with the 
antidote for use.