The embodiment of the invention discloses a two-dimensional air inlet test device, relating to a mid-range supersonic speed air-to-surface missile design technology, which can solve the problem that the thermal load under heat and force combined action subjected to the structure is not true. A gas generator is installed at one end near the outlet of a two-dimensional air inlet of a missile body simulation piece, a partition structure is arranged on the edge of the port of the two-dimensional air inlet, and the partition structure communicates the outlet of the gas generator and the outlet of the two-dimensional air inlet. The outlet of the gas generator and the other end of the missile body simulation piece are sealed, fuel gas generated by the gas generator enters the two-dimensional airinlet for combustion, the two-dimensional air inlet is connected to at least one actuator cylinder, and a quartz lamp heater is placed outside the two-dimensional air inlet for heating the two-dimensional air inlet exposed on the outside of the missile body. The device is mainly used for inner heating and outer heating and static force combined testing in the two-dimensional air inlet.