Automatic clearance eliminating type door bolt device

The utility model discloses a door bolt device capable of automatically eliminating a gap. The door bolt device comprises a bolt buckle, a bolt seat and a bolt shaft, a bolt buckle through hole is formed in the bolt buckle, and a bolt seat through hole is formed in the bolt seat; a notch communicated with the bolt seat through hole is formed in the front side of the bolt seat, the bolt shaft is assembled in the bolt buckle through hole and the bolt seat through hole, and the bolt shaft horizontally moves along the bolt buckle through hole and the bolt seat through hole or rotates around the axial direction; the bolt shaft comprises a first bolt shaft and a second bolt shaft, one end of the first bolt shaft is sleeved with a first copper sleeve, and one end of the second bolt shaft is sleeved with a check block; an eccentric rotating head is arranged at one end of the first bolt shaft; the first copper sleeve is embedded into the through hole of the bolt seat to be fixedly arranged, and an eccentric through ho