The invention discloses a catalyst coating adhering rate detection device. The catalyst coating adhering rate detection device comprises a pressure sensor, an X-direction screw and a right upright, wherein a power switch is installed on the external wall of a left upright, a test piece is fixed on the external wall of the right side of the left upright through a pressing plate, the bottom side of the test piece is fixed by a check block, an illuminating lamp is installed at the top of the right upright, a hand wheel is installed on the external wall of the front side of the right upright and located on the bottom side of the pressure sensor, a motor case is positioned on the external wall of the right side of the right upright, a marking pin is installed on a marking pin frame and can work under the condition of bad weather, the pressure sensor is added in the existing technical field, a hydraulic system is saved, the structure is simplified, the marking pin frame adopts a structure with multiple pin heads, the marking pins of different types can be placed, so that the test scope is wider, the reading function is provided, and the condition of adhesive force of a tested catalyst is more accurately and comprehensively analyzed by the read pressure value and the marking condition.