The utility model provides a tunneling device for a multifunctional multi-cutter head rectangular top pull pipe, and relates to the field of underground construction device technology, the technical problem to be solved is to reduce construction occupying area and improve tunneling work efficiency. The tunneling device comprises a housing, a tunneling handpiece and a tunneling machine head, and an earth discharge machine head, the tunneling device is characterized in that: the housing is provided with a cavity with an opening front end and a closed rear end, the cavity is an earth warehouse, the earth discharge machine head is installed in the housing, the front end inserts into the earth warehouse, and the front end is provided with a rotary screw type earth discharge groove, the tail end is connected with a pipe member communicated with the external of the housing and the screw type earth discharge groove; the tunneling machine head is formed by a plurality of rotating cutter heads axially installed at the front end opening part of the earth warehouse, the cutter heads are located at the same radial cross section of the earth warehouse, and a rotating axial line of each cutter head is parallel to the axial line of the earth warehouse, rotating tracks of the cutter heads are not intersected; the front end warehouse wall of the earth warehouse is fixedly and circumferentially provided with a plurality of digging lines in an axial symmetry. The tunneling device provided in the utility model is advantaged by capability of use in narrow construction field.