use master  
declare @spid int ;  
declare @ddlstring nvarchar(max);  
declare @dbname varchar(200);  
set @dbname='数据库名';  
declare tmpcur cursor   
for select distinct spid as spid from sys.sysprocesses  
where dbid=db_id(@dbname) ;  
OPEN tmpcur;  
fetch tmpcur into @spid ;  
while (@@FETCH_STATUS=0)  
 begin   
   set @ddlstring=N'Kill '+CONVERT( nvarchar,@spid) ;  
   execute sp_executesql @ddlstring ;  
   fetch tmpcur into @spid ;  
 end ;  
close tmpcur ;  
deallocate tmpcur ;