The invention discloses a radiation imaging device and relates to a lifting type radiation imaging device which comprises a radiation device with a radiation source and an imaging device with an imaging module, wherein the radiation device and the imaging device are arranged relatively and independently; the radiation device comprises a radiation basal disc, a radiation first-grade lifting mechanism which is arranged on the radiation basal disc, and the radiation source which is movably arranged on the radiation first-grade lifting mechanism. The imaging device comprises an imaging basal disc, an imaging first-grade lifting mechanism arranged on the imaging basal disc, an imaging second-grade lifting mechanism arranged on the imaging first-grade lifting mechanism, and the imaging module arranged on the imaging second-grade lifting mechanism. The lifting type radiation imaging device has a simple structure, a small size, and light weight; in addition, the radiation device and the imaging device are two split structures for easy assembly and disassembly and transportation; and the lifting type radiation imaging device can be used for detecting an object with the height higher than that of the radiation imaging device.