Language resource processing and linguistics research require effective retrieval on syntax tree corpus. This paper presented an index and search method for syntax tree corpus

which is efficient

accurate

and flexible. Based on the features of Chinese language and the needs for knowledge extraction

we designed seven types of indexes

aiming that with the help of structure and attribute information

knowledge extraction will be performed more effectively and accurately. Apart from general retrieval functions

our method supports retrieval based on the structure and attribute information of syntax trees. Experiments show that our method is both accurate and efficient.