The utility model relates to a trailing suction hopper dredger trailing head structure with vibration type grids. The device comprises an outer shell and an inner shell which are hinged through rotating shafts located on the two sides respectively. A counterweight assembly is arranged in front of the inner shell; the counterweight assembly comprises two opposite side plates, a counterweight crossbeam is erected between the two side plates, two inner side bases are arranged on the counterweight cross beam, a front frame is arranged at the bottom of the counterweight cross beam, and the counterweight assembly further comprises a cover plate. The device further comprises a suction port grid; the suction port grid comprises a first mandrel, a second mandrel and a third mandrel, wherein a first sleeve is arranged on the outer side of the first mandrel, a second sleeve is arranged on the outer side of the second mandrel, and a third sleeve is arranged on the outer side of the third mandrel.The grating plates are arranged in parallel, each grating plate is welded and fixed to the corresponding sleeve, the left ends of the three mandrels are located in the corresponding left side shaft holes and locked, and the right ends of the three mandrels are located in the corresponding right side shaft holes and locked. The anti-blocking device is compact in structure, the vibration effect isgenerated at the suction port grid, and the blocking condition is effectively reduced.