Material barrel with barrel cover easy to open and close by manipulator

The material barrel comprises a barrel body and the barrel cover, and the barrel cover is installed at an opening in the top of the barrel body in a matched mode; the barrel cover is opened and closed manually or by a manipulator; the method comprises the following steps: opening a barrel cover of a material barrel by using a manipulator on an automatic hermetia illucens breeding production line, applying yeast bacteria into the barrel, closing the barrel cover by using the manipulator, carrying out sealed fermentation on kitchen waste in the material barrel, opening the barrel cover by using the manipulator after fermentation is completed, and pouring the kitchen waste after fermentation in the barrel into a breeding disc to breed hermetia illucens. The empty material barrel is used for collecting and transporting the kitchen waste; the barrel opening is covered with the barrel cover, kitchen waste fermentation in the barrel is in a sealed state, the pressure of toxic and harmful gas generated by fermentatio