The invention discloses a high-mobility wind tunnel test device based on pitching heaving interaction, which comprises an X-direction mechanism, a Y-direction mechanism, a yaw mechanism, a pitching heaving mechanism and a roll mechanism, wherein the yaw mechanism, the Y-direction mechanism and the X-direction mechanism are overlapped mutually to enable the third channel of the yaw mechanism, the second channel of the Y-direction mechanism and the first channel of the X-direction mechanism to be mutually communicated; the pitching heaving mechanism is allowed to be kept in the third channel, the second channel and the first channel at the same time, the pitching heaving mechanism, the Y-direction mechanism, the yaw mechanism and the pitching heaving mechanism thus form an embedded structure, and thus, the high-mobility wind tunnel test device based on pitching heaving interaction has a compact structure, and the volume of the high-mobility wind tunnel test device based on pitching heaving interaction is reduced. In limited space, the rigidity of the high-mobility wind tunnel test device based on pitching heaving interaction is enhanced, and the working space is expanded.