The utility model discloses a comb grass machine with weeds reducing mechanism, including the quick -witted body of comb grass, comb grass sword, weeds groove and crushing room, wherein, comb grass sword is installed the comb grass that sets up in the level and epaxial and rotate around comb grass axle, comb grass axle rear is provided with grass blocking plate, the last auger that upwards promotes weeds that is equipped with of grass blocking plate, grass blocking plate's rear is connected with the ascending weeds groove of opening, weeds groove one end is provided with the air -blower, the other end is provided with crushing room, it is equipped with the discharge gate through weeds passageway and weeds groove intercommunication and crushing room bottom to smash the room. The utility model provides a comb grass machine is smashed the collection with weeds and in smashing the case, is compared in not kibbling weeds, and the utilization ratio of smashing the case is higher, and the ruderal volume of equal in quality is littleer, transport convenient more, transfer.