HRH-RMJ886 film wetting machine is an instrument with independent intellectual property rights developed in combination with tobacco test requirements. It can uniformly wet Cambridge filter without blind spots. The amount of liquid applied in Cambridge filter can be freely adjusted (1~10 mL/piece) with an accuracy of ±0.1mL. Film wetting liquid can be freely replaced and can be used for film wetting experiments of crotonaldehyde and phenol. The film wetting machine can perform vacuuming operation to volatilize organic solvents such as ethanol, acetonitrile and the like, e.g., film wetting experiment for carbonyl compound detection. The instrument can moisten 44mm and 92mm Cambridge filters, and can easily take out Cambridge filters with applied liquid.