Abstract: A hot-wire method was presented for measuring the thermal conductivity of food materials.The measuring technique,in order to assure the reliability of measuring results was discussed in detail . The measured results of the food materials, such as apple, cucumber and so on, were reported.It was found that the thermal conductivity has shown the linear relations to the water contents approximately,and a new expression with the relationship between the thermal conductivity of food materials and their water content was drawn.

Key words: Thermal conductivity Food materials Hot-wire method