Safety lock for aviation dining car

The utility model relates to the technical field of dining car safety locks, and discloses an aviation dining car safety lock which comprises a first box body, a meal box is slidably connected to an inner cavity of the first box body, a heat insulation layer is fixedly arranged in the inner cavity of the first box body, and a heating pipe is fixedly arranged on the left side of the inner cavity of the first box body. A supporting column is fixedly arranged at the bottom of the first box body, a second box body is fixedly arranged at the bottom of the supporting column, a connecting block is fixedly arranged at the bottom of the second box body, and a supporting block is fixedly arranged at the bottom of the connecting block. Through cooperative use of the first box body and the heating pipe, purified water at the bottom of the inner cavity of the first box body is heated through the heating pipe, so that food stored in the meal box can be subjected to heat preservation, it is ensured that the food cannot be c