By the use of Frastrates 3.3

some landscape indices representing the landscape expression were calculated for the landscape expression of construction lands at the landscape level and class level on the basis of the description of the landscape pattern of Beijing mountain area.The change of landscape pattern of construction land was analyzed using these indexes.Results show that the ecological construction brings about the continuous increase of green space

and the landscape change had a trend of simplification and homogeneous

which will result in a compartment pattern.As for construction lands

their shapes are more fragmented and anomalistic

and the neighboring probability is increased among the patches.The landscape function is turbulent as the shape takes on a change trend of no disciplinary.A deep exploration of landscape pattern indicates that both town land and factory land are being concentrated.However

the pattern of rural residential land is still dispersive

and even become worse.Factory land has not formed its gathering efficiency

and the construction of transportation is the key whether the town can bring its role as a growing pole into play or not.To realize this

being guided by a scientific land use planning is a necessity.