Five different varieties of fresh tomatoes planted in the demonstration base of the Institute of Vegetable Research， Wuhan Academy of Agricultural Sciences were used to analyze the dynamic changes of fruit color， hardness， and quality indexes including vitamin C， soluble sugar， titratable acid， lycopene， and minerals during the ripening to explore the dynamic quality changes of fresh tomato during the growing period and to guide cultivation and establish suitable harvest period. The results showed that the hardness decreased from 3 000-4 000 g to 1 000-2 000 g， the peel red color gradually deepened， the lycopene increased to about 0.016 mg/g during the ripening of fruit. The content of soluble solids， vitamin C， glucose and fructose all showed a change pattern of first increase and then decrease， and reached the maximum value at the stage of hard-ripening. The sugar-acid ratio and soluble sugar generally showed a gradual upward trend. The content of soluble protein， titratable acid and malic acid showed a gradually decreasing trend. There were significant differences in the content of certain minerals in the same variety of tomato in different growth periods as well. It is indicated that the hard-ripening stage is the most suitable harvest period for fresh tomatoes. The sugar-acid ratio， the content of fructose and soluble protein of NT31 tomato areabout 7.5， 15.0 mg/g， 17.0 mg/g，respectively， which has higher nutritional and commercial values.