The tomato planting experiments in different planting densities and seasons were carried out to obtain the fruit growth data. Subsequently, the dynamic model of tomato fruit individual growth was established based on revised logistic model and the environment data (temperature, humidity, light). The experimental data were fit well with model output using Matlab software. The results indicate that tomato fruits grown in different phytomer positions and the same planting density have the same sink size. The linear relationship can be found between the diameters of different fruits with the same truss. Moreover, there is a delay of growth between different truss fruits.