The invention relates to a blocking device for a flowing water path and sorts of streams, especially for the torrent or the similar river bed. The device has a bend obstacle component in the way of water integrating net; the component transversely extents from one riverbank to another riverbank. The water integrating net is installed between the lower supporting wire and the upper supporting wire. The supporting wire is anchored on the riverbank by using the wire anchor piece fixing the end part; so that the wire anchor piece of the upper supporting wire biases to the front of the wire anchorpiece of the lower supporting wire corresponding to the flowing direction. In that way, when obstacle is filled, the water integrating net is deformed so that the water flowing out of the net, the rock, floating object are temporarily contact to the water integrating net or never contact to the water integrating net at all. In that way, the invention has great security and permanently avoids the erosion and wearing effect for the flowed water.