Update README

Signed-off-by: shiyu22 <shiyu.chen@zilliz.com>

README.md

@@ -1,2 +1,72 @@
-# text-spliter
+# Text Spliter
+
+*author: shiyu22*
+
+<br />
+
+
+
+### Description
+
+**Text spliter** is used to split text into chunk lists. 
+
+> Refer to [Recursive Characters](https://python.langchain.com/en/latest/modules/indexes/text_splitters/examples/recursive_text_splitter.html) for the operation of splitting text.
+
+<br />
+
+
+
+### Code Example
+
+```Python
+from towhee import pipe, ops, DataCollection
+
+p = (
+    pipe.input('url')
+        .map('url', 'text', ops.text_loader())
+        .flat_map('text', 'text', ops.text_spliter())
+        .output('url', 'text')
+    )
+
+res = p('https://github.com/towhee-io/towhee/blob/main/README.md')
+DataCollection(res).show()
+```
+
+<img src="./result.png" alt="result" height="200px"/>
+
+<br />
+
+
+
+## Factory Constructor
+
+Create the operator via the following factory method
+
+***towhee.text_loader(chunk_size=300)***
+
+**Parameters:**
+
+​	***chunk_size***: int
+
+​	The size of each chunk, defaults to 300.
+
+<br />
+
+
+
+### Interface
+
+The operator split incoming the text and return chunks.
+
+**Parameters:**
+
+​	***data***: str
+
+​	The text data.
+
+
+
+**Return**: List[Document]
+
+A list of the chunked document.