The utility model relates to a flue gas denitration technical field provides a device suitable for on - -spot sampling of SCR catalyst. The device includes the device body, the device body is the box structure for laying of catalyst, gyro wheel and handle are installed to the outside of device body, follow the internal surface of box is provided with shockproof inside lining. The utility model discloses a device suitable for on - -spot sampling of SCR catalyst's simple structure just is convenient for guide and support, has improved the speed of shipment when the catalyst sample is taken a sample. In addition, the device is inside has done the design of moving away to avoid possible earthquakes, can avoid extrusion, the collision of catalyst sample to guarantee the physics and the chemical property of catalyst.