The invention provides an outdoor meal heating device. The outdoor meal heating device comprises a box body and a box cover, wherein the bottom of the box body is provided with a heating layer and a heat insulation layer respectively from inside to outside; a box body electrode contact is arranged at the bottom of the heating layer and a power supply box is arranged at the lower part of the heat insulation layer; a power supply electrode is arranged at the upper part of the power supply box; the power supply box is provided with a USB (Universal Serial Bus) interface and a charging interface; the heating layer extends into the middle of a side wall of the box body; a tripod is arranged at the bottom of the box body; and a lunchbox is arranged on the tripod. The outdoor meal heating device provided by the invention has a small whole structure; in winter of the north, snow gleams white; and if no water exists, snow can be put into the outdoor meal heating device and meal is put on an iron frame, then the meal can be heated after 15 minutes and the operation is very simple.