It is an important topic in land use researches to carry out cultivated land sustainable evaluation. In this paper, the concepts of cultivated land eco-unit and cultivated land niche are put forward, and the niche-fitness model (Fi model) is constructed based on niche theory and cultivated land ecosystem theory. The Fi model deduced by absolute difference between two groups of standardization numerical value, can effectively measure the level of cultivated land sustainable use of a region. It can express suitability degree between real niche (Xm) and optimal niche (Xa) in an area. Then, the model is applied to measure the cultivated land niche-fitness of Jiaozuo during the years 1997-2006. As a contrast, the restriction factor model (NFmin-i model) and Hibert space model（CHi model）are also used as a measurement of the niche-fitness of cultivated land sustainable use. The results show that: (1) The value of Fi increases from 0.5088 to 0.6503 during 1997-2006, evidently indicating that the influencing factors related to nature, economy and society keep a good development trend. In other words, the real niche of cultivated land sustainable use tends to the optimal niche. But there is a fluctuation state during the years 1997-2002, which shows relevant policy of protecting cultivated land can not be thoroughly carried out. The maximum value of Fi is only 0.6503 during the years 1997-2006, which primarily deciphers the inconsistency between real niche and required niche. Consequently, the government should take pertinent measures to largely promote the cultivated land sustainable use. (2) The changes of the value of Fi are in coincidence with the variations of the value of CHi and the value of NFmin-i, remarkably denoting that the Fi model is scientific and realistic in cultivated land sustainable use evaluation. The cultivated land niche-fitness value of Fi has a wide distribution of 0.5088≤Fi≤0.6503 in interval of \[0, 1\], as compared with CHi value of 0.7613≤CHi≤0.8775. In addition, the Fi model has lots of advantages due to the alternative parameter α. Moreover, the value of Fi can properly represent the overall measurement of cultivated land sustainable use niche-fitness as compared with the value of NFmin-i. (3) The results reveal that the optimal niche can be regarded as the criterion of cultivated land sustainable use, and the matching way can be used to carry out cultivated land sustainable use evaluation. All these offer the theories and ways for cultivated land sustainable use evaluation.