The utility model discloses a tobacco leaf thickness monitoring device based on industry camera. Monitoring devices includes fume chamber (1), sets up in transparent viewing window (3) of fume chamber (1) side, arranges CCD camera (5) in transparent viewing window (3) dead ahead in, with image acquisition card (8) that CCD camera (5) is connected, computer (9) and feeding transmission band (10) that receive computer (9) control action speed that link to each other with image acquisition card (8). The utility model provides a tobacco leaf thickness check method can satisfy the industry requirement very easily, has good feasibility and stability, great improvement the qualification rate and the production efficiency of product, realized in the cigarette production in -process fume chamber automatic control of smoked sheet or pipe tobacco flow.