The invention relates to the technical field of bait, in particular to bait for trapping a catfish, which is strong in fishy flavor, strong in penetrating power and good in fishing effect and can sufficiently attract more fish schools within a short period of time. The bait for trapping the catfish is prepared according to the following specific steps: proportionally weighing pork intestine powder, mealworm powder, chicken intestinal powder, duck intestine powder, freshwater shrimp powder, snail powder, bloodworm powder, corn flour, Cyperus rotundus, vegetable protein powder, aqueous fragrant powder, eating-promoting agent powder for fish, stimulant powder for fish, hungry-promoting agent powder for fish, spray powder, goat milk powder and binder powder, mixing, putting a mixture into a stirrer, stirring for 50-60 minutes, taking out, putting the mixture into a dryer, drying, taking out, naturally airing, putting the mixture into the stirrer, stirring for 40 minutes, putting the mixture into an expander for expanding, cooling, and packaging the mixture. The bait for trapping the catfish has the advantages as follows: the bait has strong fragrance and has strong fishy flavor after being put into water, and the strong fishy flavor quickly generate strong penetrating power to stimulate taste buds of the catfishes, so that a large number of fish schools are attracted to eat and people can fish the catfishes conveniently.