One-way　traffic　blocking　on　four-lanes　freeway　was　divided　into　three　types　in　this　paper,　such　as　blocking　on　outside　lane,　inside　lane　and　double　lanes.　Then　one　lane　blocking　was　conducted　under　five　kinds　of　volume　and　six　kinds　of　blocked　time,　moreover　two　lanes　blocking　was　conducted　under　seven　kinds　of　volume　and　five　kinds　of　blocked　time,　and　the　simulation　conclusions　were　obtained　respectively.　The　relationship　models　among　blocking　duration　time,　upstream　volume　and　blocking　time　are　established　and　tested.　This　study　can　be　used　to　predict　the　duration　time　of　the　freeway　blocking　under　certain　volume　or　blocked　time.