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The relationship between the fractal dimension for soil water retention curve of the disturbed and undisturbed soil was studied in greenhouse soil. It was showed that on the condition of the same soil texture, fractal dimensions increased with the increasing of soil bulk density. There was significant linear relationship between the fractal dimension of the disturbed soil and that of the undisturbed soil. Based on the fractal dimension of soil weight distribution and soil water retention curve of Brook-Corey model, water retention curves of the disturbed and undisturbed soil were predicted. The results show that the predicted values of soil water retention curves fit the measured data. So, it is feasible to estimate soil water retention curve of the undisturbed soil based on the fractal dimension of the disturbed soil in the greenhouse soil.