The land in Development Zone includes not only non agricultural land with certain infrastructure, but also agricultural land in the sphere of planning, which is to be requisitioned. Land use sustainability of Development Zone involves two aspects, one is sustainability of every land use unit itself, and the other is the sustainability on structural side. To realize sustainable land use of Kunshan Economic and Technological Development Zone (KETDZ), it is necessary to understand the status quo of land use. Land use classification and evaluation are the feasible tools to understand it. In this paper, Landscape eco classification is applied to classify land use types of KETDZ. First, according to the human influencing intensity and the existing situation, four types of land use can be classified: Land in planning sphere without being requisitioned (type A); land requisitioned or granted use right without being constructed (type B); land granted use right and conducted construction activities without being utilized (type C); and utilized land (type D). Then, 17 subtypes and 20 subdivisions are classified according to the differentiation of succession process and conditions, and differentiation of functions, respectively. Accordingly, forecast evaluation of type A is to determine its developing sequence in the future development, evaluation of type B is to determine suitable utilizing and disposing ways to attain sustainable land use, and evaluation of types C and D is to evaluate their sustainability ranks. At last, sustainability evaluation of land use of KETDZ is carried out based on the establishment of the corresponding index systems of evaluation. According to the results of land use classification and evaluation, it can be seen that many land use types are not sustainable in KETDZ, and on the structural side, this is also particularly problematic.