Anti-extension blocking device for online embossing of fiber cement board

The utility model discloses an anti-extension blocking device for online embossing of a fiber cement board, which comprises a main body unit which comprises a rack for placing the fiber cement board and a mounting beam arranged on the rack; the telescopic limiting unit comprises a telescopic air cylinder installed on the installation beam, a connecting support arranged at the output end of the telescopic air cylinder, guide blocks arranged on the two sides of the connecting support and an installation block fixedly arranged on one side of the guide blocks, and the guide blocks are slidably connected with guide rods; a first spring is arranged between the end of the guide rod and the mounting block, and the tail end of the guide rod is fixedly connected with a limiting abutting plate. According to the device, when fiber cement board compression roller embossing is deformed and lengthened, the telescopic air cylinder controls the whole limiting abutting plate to move towards the side close to the fiber cement b