Abstract: Environmental factors modified model has an important role for single-leaf net photosynthetic rate of greenhouse tomato in environmental regulation. Based on experimental data and prediction literature, fundamental temperature modified model for the maximum photosynthetic rate of greenhouse tomato in single-leaf net photosynthetic rate was developed. Through the net photosynthetic rate in the different CO2 concentrations, different light intensity, and different temperature, a part of the data used to determine the parameters in the model, other of the data used to test the model results. The results, which were determined by the value of the correction factor C formula and by the fit test, showed that the simulated and observed data of net photosynthetic rate of the tomato leaf simulation model fitted well. This model could be as a sub-model of the photosynthetic simulation model of tomato in greenhouse, so that the photosynthetic model of tomatoes tends to be perfect. Single-leaf net photosynthetic rate of plant model is better suited for greenhouse tomato production.