The invention discloses a device for taking bone cement out of marrow cavities. The device comprises a tubular drill bit and a driving device, the driving device is connected with the drill bit and drives the drill bit to rotate around the axis of the drill bit, and multiple protruding excavation teeth are arranged at the top of the pipe wall of the front end of the drill bit, wherein the excavation teeth surround the pipe wall. The device has the technical advantages that a transmission rod is connected and can change the direction at will to be adapted to different types of marrow cavities. A head of a tubular saw blade is inclined to the inner side, so that the head of the tubular saw blade can avoid bone cortex, only the bone cement is cut in the advancing and cutting processes, and the bone cortex cannot be damaged. The bone cement which is cut down is moved upward, squeezed and stored in a tubular storage tube. When the bone cement is taken out completely or stored to be full, the storage tube is provided with a squeezing device, and aggregated bone cement fragments can be squeezed out one time.