The landmass of Cambodia is located in the Southern portion of Indochina Peninsula in Southeast Asia which landscape is characterized by a low-lying central plain, eastern highlands, southwestern upland blocks and northern plain of sandstones. The low lands and small mountain clefs of Cambodia is known for deep tropical rain forest which flourish wide range of plants and animals that are mostly concentrated in the “Tonle Sap" range. On the evidence of our investigation it suggests that the evergreen forest of Cambodia suit common fauna with tropical Africa, Indo-pacific region and its adjacent neighbouring countries (Distant, 1904; 1911; Schuh, 1979, 1984; Yasunaga, 2010; Duwal et al., 2010). From the survey data 2010- 2012 (April) more than 30 species of subfamily Phylinae of genera: Acrorrhinium Noualhier, 1895; Alloeomimus Reuter, 1910; Atractotomus Fieber, 1858; Biliranoides Schuh, 1984; Campylomma Reuter, 1878; Decomia Poppius, 1915; Hallodapus Fieber, 1858; Lasiolabops Poppius, 1914; Malaysiamiroides Schuh, 1984; Papuamimus Schuh, 1984, Pilophorus Hahn, 1826; Sthenaridea Reuter, 1885; Tytthus Fieber, 1864, etc. with some new species are found. Therefore it is suggested that Cambodian climate and flora shelter members of Oirental fauna included in most tribes of the subfamily Phylinae; Auricillocorini, Hallodapini, Leucophoropterini, Phylini and Pilophorini. Of course this study is not enough for to clarify the phylinae fauna of Cambodia, but it's a preliminary data for further accomplishment in the study of phyline bugs from this region which is expected to be distributed for about 250-300 species.