The paper introduces the present main exsiting problem of earth resources,especially the severe situation of the mineral resources,land resources and water resources,and then puts forward some feasible safety strategies to the resources.

On the basis of infrared measurementt,he temperature distribution on T-joints of 5A06 aluminum alloy cylinder structure was simulated by finite element method,developing a composite heat source constituted by Gauss heat source on the surface and inner double ellipsoid heat source.