可能的原因如下：您可能還沒向百度提交您的網站； 您已經登錄了網站，但由于時間短，百度還未收錄； 如果百度檢測到您的網站無法訪問，您的站點就有可能被百度暫時刪除； 如果您的網站內容有不符合中國法律的地方，則無法被百度收錄； 如果您的站點頁面結構復雜，則可能無法被百度收錄（詳見如何使您的站點被百度有效收錄）；

You may not to Baidu to submit your site;
You have logged sites, but a short time, Baidu has not included;
If Baidu detected that your website can not access your site is likely to be Baidu temporarily removed;
If your site content is not consistent with Chinese law places can not be Baidu included;
If your site page structure complex, it may not be Baidu included (see how to make your site by Baidu effective included);

如果您的網站被百度判別為垃圾站點，則可能被百度拒絕收錄或者隨時刪除（詳見百度關于垃圾網站的處理）。

如果您的網站的首頁在百度搜索不到，則可能是由于您的網站不穩定使首頁被判別為死鏈接導致丟失。您的網站穩定后，首頁會重新在百度中被搜索到。

If your site has been identified as spam sites Baidu, Baidu may be included or at any time refuse to remove (see Baidu on waste treatment site).
If your site's home page in the Baidu search less, it may be because your site instability Home sentenced to death another link to cause loss. After your site is stable, Home will be back in Baidu in the search.

百度并不允諾能收錄所有站點。如果有上述回答無法說明的問題，請發信到webmaster@baidu.com詢問。