The utility model discloses a fodder reducing mechanism of antiseized wall during shrimp is bred, including grinding tank, storage tank, crushing component, reciprocating sieve, fan, crushing components are installed is in grinding tank, and grinding tank and storage tank are distinguished through the reciprocating sieve and is separated, have following advantage: the device smashes the condition in can greatly improving grinding tank, makes the interior fodder of grinding tank fully smash, eliminates the fodder and the condition that crushing apparatus bondd simultaneously effectively, has improved the life of equipment.