SELECT s.sid,s.serial# as serial,o.object_name,
/*+ rule */ lpad(' ',decode(l.xidusn ,0,3,0))||l.oracle_username User_name, 
o.owner,o.object_type 
FROM v$locked_object l,dba_objects o,v$session s 
WHERE l.object_id=o.object_id 
AND l.session_id=s.sid 
ORDER BY o.object_id,xidusn DESC

?

object_name代表当前正在锁定的数据库对象，一般是表，找到目标表，用下面的语句杀掉锁定：

--133表示SID,3506表示serial
alter system kill session '133,3506' ;