本文研究了在大气中用燃烧火焰法沉积出的金刚石的结晶形态。结果发现，所沉积出的金刚石除了八面体和十四面体单晶外，还有尖晶石型、伪五角型、二十面体型及球型等多重孪晶颗粒（Ｍｕｌｔｉｐｌｙｔｗｉｎｅｄｐａｒｔｉｃｌｅｓ，ＭＴＰＳ），并与实验模型进行了对比观察。所有ＭＴＰＳ大多是以｛１１１｝面为孪晶面。在｛１１１｝面上还有大量层错和显微孪晶。本文还对产生上述晶体形貌的原因进行了理论分析。 In this paper, the crystalline morphology of diamond deposited by combustion flame in the atmosphere is studied. The results show that the deposited diamonds have many kinds of twins, such as spinel, pseudo pentagonal, icosahedron and spheroid, besides the octahedral and tetradecate single crystals, Compared with the experimental model. Most of the MTPS are {111} planes as twin planes. There are a lot of stacking faults and micro twins on the {111} plane. This article also made a theoretical analysis of the reasons for the above crystal morphology.