The utility model provides a kind of mould plate protection device for food detection, it includes sealed bag, the sealed bag has bag mouth and is closed using sealing structure, it is characterized by: the sealed bag also has at least 1 opening, the opening is closed by hydrophobic air-permeable
composite film, the hydrophobic air-permeable
composite film has several micropores, the periphery edge of opening and the periphery edge of hydrophobic air-permeable
composite film are sealed connection.The mould plate protection device for food detection of the utility model, by the hydrophobic waterproof performance and air-permeable performance of hydrophobic air-permeable composite film, on the one hand, can block the
pollution of external mould spores to the plate in device, on the other hand, can prevent the spores from sample source in device from overflowing outward, to reduce the risk that mould
incubator is polluted by different source mould spores, reduce
incubator frequent shutdown sterilization times, while avoid moving plate frequently during cultivation and cause inaccurate result.