The utility model discloses a drill bit device of an abrasion drill for treating uneven geology, and belongs to the field of pile foundation construction technologies. The drill bit device comprises an abrasion drill bit and is characterized in that the abrasion drill bit is sleeved with a steel sleeve (2); the excircle of the enclosure wall (1) of the abrasion drill bit is fixedly connected with the inside wall at the upper end of the steel sleeve (2); a plurality of alloy tooth bits (3) are uniformly arranged along the circumference of the lower end face of the steel sleeve (2). The drill bit device is simple in structure, and can effectively ensure smooth and vertical drilling in the uneven geology, quality of drilled holes and quality of a pile foundation. The drill bit device has the advantages that the structure is simple, the principle is easy to understand, the materials are convenient to obtain, the cost is low, and high practicability is achieved.