SELECT     'GRANT EXECUTE ON[dbo].[' + name + ']TO [user]' AS t_sql
FROM         sys.procedures

得到的脚本直接批量执行即可：
GRANT EXECUTE ON[dbo].[sp1]TO [user]
GRANT EXECUTE ON[dbo].[sp2]TO [user]
GRANT EXECUTE ON[dbo].[sp3l]TO [user]
GRANT EXECUTE ON[dbo].[sp4]TO [user]
GRANT EXECUTE ON[dbo].[sp5]TO [user]
GRANT EXECUTE ON[dbo].[sp6]TO [user]