Lens-protective optical platform of transmission type smoke meter

The utility model relates to a smoke measuring device of a diesel vehicle, in particular to a lens-protective optical platform of a transmission type smoke meter; the platform comprises a blower, a detection pipeline, a gas chamber pipeline, a smoke inlet pipe and an photoelectric detection unit; a protective lens device is additionally arranged and prevents the smoke from being discharged by an oil-gas containing engine and from directly contacting with the surface of the lens; the protective lens device can be conveniently pulled out and cleaned, so that the usage convenience of the whole performance of the instrument can be improved greatly. In addition, the processing of standardized parts is utilized, the structure of products is simplified and the production efficiency and connection accuracy are improved.