To solve the problem of free placement of different materials at any location on a part during selective laser melting, the manufacturing technology of selective laser melting of heterogeneous material parts was studied. This method is based on supplying powder through multiple funnels and cleaning and recovering of powder using a flexible scraper. The processing mechanism, the prevention mechanism of powder cross contamination, and the data processing method of heterogeneous material parts were discussed in detail. Two materials, namely, a CuSn10 alloy and 4340 steel, were used to verify the technology. Experiments show that this method can effectively solve the difficult problem of heterogeneous material placement during selective laser melting and can realize the formation of heterogeneous material parts. Specific results of the study are as follows: (1)Heterogeneous materials can be arranged freely in different layers or in different zones of a single layer. (2) For a bulk heterogeneous material part, the average mass percentages of Fe in the copper alloy region and of Cu in the steel region can be controlled to less than 2% and less than 1%, respectively. (3) A heterogeneous material gear part with a complex shape and the characteristics of a narrow material region is successfully formed. The heterogeneous material distribution of the part is not limited by the complex shape, and the materials can be arranged freely as needed. The heterogeneous material region in one layer with a 0.5 mm width can also be well expressed, and the dimensional error does not exceed ± 0.1 mm.