Multifunctional heating lunch box

A multifunctional heating lunch box comprises a box body and a box cover, a food containing box is contained in the box body, a charging port is formed in the outer portion of the box body, a heatingplate is arranged at the bottom of the inner side of the box body, a controller electrically connected with the heating plate is arranged on the inner side wall of the box body, a timing module and acontrol module are arranged in the controller, and the control module can be wirelessly connected with a mobile phone APP; a through hole is formed in the box cover, and a silica gel color-changing part is fixedly mounted in the through hole and is made of color-changing silica gel; a vent hole is formed in the box cover, a valve installation ring seat is fixedly installed on the vent hole, a silica gel valve is installed on the valve installation ring seat, a plurality of valves are arranged at the bottom of the silica gel valve, a gas-water separation filter membrane is arranged on the top face of the silica gel valv