Abstract: The dissipated heat coefficient of pot for focusing solar cooker is an important physical paramefer on the analysis, test and count the thermal performance of the solar cooker. This paper discusses the dissipated heat coefficient of pot and set up a new experimental, U=aV^b+c. This conclusion, which is different from the older generation (seniors) can be reached that the dissipated heat coefficient is the power function of wind speed. Simultaneous, analyse the inflnence of the dissipated heat coefficient of pot for the thermal efficiency of focusing solar cooker, its conclusion is: the dissipated heat coefficient of the pot has not only little effect on the light efficiency and immediate heat efficiency of collective solar cooker, therefore this effect can be reslected, but also great effect on its total heat efficiency.