The invention creatively discloses a flow observation device for seismic observation. The flow observation device comprises a cylindrical shell, a top cover plate, an integrated seismometer, a storagebattery, a control box, a wireless router, a GPS module and a solar power supply assembly; the interior of the cylindrical shell is divided into an upper-layer space, a middle-layer space and a lower-layer space through two movable separation structures. According to the flow observation device for seismic observation, the buffer type fixed installation of a bottom mounting plate can be realizedby means of protective foam blocks, so that the integrated seismometer can be effectively protected during a transportation process; transmission rods are used for internal and external transmission,so that vibration influence caused by other equipment when the flow observation device is directly installed on the cylindrical shell is avoided, and the reliability of vibration transmission is enhanced; the movable separation structures are adopted to realize internal separation and installation, so that the detachment and mounting of the protective foam blocks can be facilitated, and the maintenance of all equipment in the flow observation device is facilitated.