Aircraft air-ground signal analog conversion device and system for aircraft test

The utility model provides an aircraft air-ground signal analog conversion device and a system used for aircraft test, comprising a first component, the first component comprises a ferromagnetic part, the ferromagnetic part is configured to be a proximity sensor capable of fitting an aircraft landing gear, and is used for simulating a target of the landing gear when an aircraft is actually in a ground state; the conversion from a ground state to an air state can be realized; the second part comprises a non-ferromagnetic part, and the non-ferromagnetic part is configured to enable a proximity sensor of the aircraft landing gear and the target to be separated from each other and is used for achieving switching from the air state to the ground state when the aircraft is actually in the air state; and the connecting part is used for connecting the first part and the second part. Therefore, the air-to-ground signal of the aircraft can be quickly converted by a simple structure. In particular, only one multifunctio