The invention provides a lithium sulfide-porpous carbon compound positive material for a lithium ion battery and a preparation method thereof. The positive material is formed by compounding lithium sulfide and ordered porous carbon, wherein the mass fraction of the lithium sulfide in the compound material is 20-80%; and the lithium sulfide exists in the pore spaces of the porous carbon. The preparation method comprises the following steps: firstly, carrying out ball milling on the ordered porous carbon and sulfur in the presence of inert gas; then carrying out thermal processing on the milled mixture at the temperature of 145-155 DEG C so that the sulfur fully is dispersed into the porous carbon; and finally, reacting lithium with the sulfur so as to generate the lithium sulfide by a chemical or electrochemical method, thereby obtaining the positive material provided by the invention. According to the invention, the preparation process is simple, and the raw material source is wide; the prepared positive material is used in a mode of pre-embedding lithium in a positive electrode, metal lithium is not required to serve as a negative electrode, and a carbon negative electrode, a silicon negative electrode and the like are used, thereby improving the safety performance and the assembling performance; the positive material has the advantages of good conductivity, high capacity and good circulation performance; and the positive material has a wide application prospect and the preparation method is suitable for industrial production.