Automatic excavating device for fire barrier for forest fire

The invention discloses an automatic excavating device for a fire barrier for forest fire. The automatic excavating device comprises a main body mechanism, an arbor cutting mechanism, a shrub cutting collecting mechanism, a soil deep ploughing mechanism and a smoke discharge cooling mechanism, wherein the arbor cutting mechanism, the shrub cutting collecting mechanism, the soil deep ploughing mechanism and the smoke discharge cooling mechanism are arranged on the main body mechanism. The automatic excavating device solves the problem of being single in a method for cutting off a spreading path of fire by adopting a mechanical device when forest fire occurs at present, can replace at least three mechanical devices capable of achieving a single function, can use operation space effectively, achieves comprehensive capacities of clearing and gathering inflammable objects on the earth surface in a forest and deep ploughing earth surface soil, can improve working efficiency, effectively saves time for cutting off t