The present invention is one kind of environment friendly energy-saving diesel oil and its compounding process, and belongs to the field of petroleum technology. The environment friendly energy-saving diesel oil is compounded with fatty methyl ester 5-50 wt%, base oil 10-60 wt%, GB diesel oil 5-50 wt%, cetane number improver 0.1-2 wt%, pour point depressant 0.1-2 wt%, viscosity regulator 1-10 wt%, deodorant 0.1-2 wt%, smoke-eliminating oil saver 0.1-2 wt%. The production process of the present invention is simple and low in cost, and the environment friendly energy-saving diesel oil has lowered consumption, high dynamic property, high stability, good low temperature starting performance and environment friendship.