The utility model discloses an on - -spot quick testing appearance of cohesive strength, the support frame setting is provided with the roof in base both ends top on the support frame, and the roof is fixed being provided with cylinder down, and the cylinder is connected with a supporting bench, and a supporting bench connects through the telescopic link and is provided with test platform, and test platform is connected with the motor, and the test platform below is provided with the dowel steel, and the dowel steel below is provided with the detachable pressure head, the roof is the fixed air -operated controller component that is provided with still, and the air -operated controller component passes through the trachea and connects the cylinder, fixes being provided with the automatic reading device on the support frame, and the automatic reading device is connected with provides the air -operated controller of continuously adjustable atmospheric pressure the component. This application device is small, light in weight, and the transport is nimble, and is with low costs, and convenient to use can truly reflect the shaping speed of on -the -spot thin paste seal and little table department, and be convenient for test and scientific research are used, automatically, accomplish whole test procedure at existing field energy, need not manual operation.