【Abstract】： not only play a boundary wall， the division of space， the function of resisting foreign， in today's modern landscape design is an important part of landscape design in the wall， the wall of the functional meaning is extended mining， for the use of the wall from the artistic， functional， cultural and other aspects to think， but how to reasonable use of wall of these functional meaning， create the unique charm of the landscape space， is the key point of this study.

【Key words】： the function of the actual situation

Wall with its changeful modelling， change the rich set of combinations， have very strong nature landscape， landscape elements is indispensable to the botanical garden space. In gardens ingeniously use scene wall garden space is divided into many functional unit， the transverse plane function is reasonable， the longitudinal strewn at random discretion levels more rich， using the continuity of the landscape wall and clear direction， guide the visitors as wall sign towards orderly leading the beauty of the different space.

Wall between virtual relationship refers to surround close space entity relationships of landscape space， the wall between virtual relationship to light and shade of the space， space of open and closed， as well as the space around the method.it is also makes the space or accurate or blurred border. Window and door in the suzhou gardens， on the wall of the design， make the scenery begets nakedness， foil each other， interdependence， thick. Visitors will not feel the space block when visiting， but don't think the real， arouse the curiosity of tourists.

\"Solid wall\" is a solid wall， it can cut off people through the line of sight， and hindered through the behavior of an object. \"Solid wall\"， such as not to design processing is frowsty， stiff， give a person psychologically very frowsty， visually unpleasant experiences. There are two ways in the design of can better improve the quality of the space. First can fully exert the characteristics of material itself， through the shape， composition， color， material and so on flexible use of elements， the \"wall\" itself become a scenery， for the space.

Wall \"virtual\" performance in surround close space is not closed， tracery on metope， the gate to make the space points and die， not only have framing effect also increase the space of interest. Metope and plants， water， the combination of decoration， wall is broken and is linked together， make the space have layers， rhythm.

Landscape design of the \"empty and fact\" complement each other， interdependence， \"empty and fact\" in the space layout， artistic conception in landscape construction and landscape in the actual situation of processing， is the future landscape wall design on the landscape design of virtual and actual exploration， guide the trend of the development of the modern landscape design.