Global warming plays an important impact on the carbon cycle of forest ecosystems, and biogenic volatile organic compounds (BVOCs) are important carbon-containing secondary metabolites biosynthesized in ecosystem. As the dominant components of BVOCs, the synthesis and release of monoterpenes (MTs) act as an important way to participate in the carbon cycle of forest ecosystems. In this study, Two-year-old potted seedlings of Cunninghamia Lanceolata (Lamb.) Hook and Schima superba Gardn.et Champ, the common tree species in lower subtropics, were selected as the research objects, and three treatments namely no heating (CK), heating wire heating (HW), and infrared radiator heating (IR) were set up. The effects of different heating methods on the emission rates of monoterpenes, photosynthetic parameters and related enzyme activities of C. Lanceolata and S. superba were analyzed. The results showed that the emission rates of monoterpenes in C. Lanceolata was significantly higher than those of S. superba, which were 4027.634-16239.608 pmol m^-2 s^-1 and 49.228-130.512 pmol m^-2 s^-1, respectively. The HW resulted in an approximately 2-fold increase in the emission rates of monoterpenes for C. Lanceolata, with limonene and γ-terpinene being the dominant component, which accounted for 73.3% and 15.1%, respectively. The emission rates of monoterpenes decreased by 52.6% under the IR treatment, with limonene and α-terpinene being the dominant components of monoterpenes accounted for 71.3% and 18.9%, respectively. The change trend of the stomatal conductance of C. Lanceolata among different treatments was similar to the results of the emission rates of monoterpenes, which could prove from the side that the heating might further affect the emission rates of monoterpenes by affecting stomatal conductance of plant. After heating treatment, the net photosynthetic rate of S. superba increased, and there was a significant increase for HW treatment (9.890 μmol CO₂ m^-2 s^-1). It is worth noting that there were significant differences in the net photosynthetic rate of S. superba between the two heating methods (P<0.05). Therefore, when we conducted the impact of global warming on the carbon cycle of the ecosystem simulation studies, different heating methods should be taken into consideration,to further clarify whether the influence produced in the study is the influence of the heating method itself. It is necessary to set up multiple heating methods as much as possible for more fully understanding the ecological effects of global warming, which could provide more reliable data for establishment of the global warming model.