Automatic slag blocking type ecological interceptionditch

The invention discloses an automatic residue-blocking type ecological interception ditch, which comprises: a drainage tank arranged at the water inlet front end of an intercepting ditch; a water and slag blocking device comprising a water baffle and an intercepting net, wherein the intercepting net is connected to one side of the water baffle, the connecting position of the intercepting net and the water baffle is rotationally connected to the side, close to the intercepting ditch, of the drainage groove, the water baffle rotates in the drainage groove under the action of external force, and a water inlet is formed in the drainage groove; and a drainage ventilation pipeline system comprising ventilation pipes distributed in the intercepting ditch, wherein an exhaust pipe is communicated with the water inlet through a water inlet pipe. The automatic slag blocking type ecological interception ditch is arranged around a lake or a river and used for primary treatment of non-point source pollution sewage entering natural water, entrained large and medium-sized garbage can be effectively intercepted through the water and slag blocking device, so that the interception ditch at the rear end is prevented from being buried by the garbage and losing functions, and cleaning is convenient; and the arranged drainage ventilation pipeline can solve the problems that a common intercepting ditch cannot be backwashed after being used for a long time and is in an anoxic environment.