The utility model discloses a bidirectional drilling machine which comprises a frame, at least two sets of bidirectional drilling devices and clamping devices, wherein the bidirectional drilling devices are mounted on the frame; the clamping devices are used for clamping workpieces; horizontal guide rails are arranged on the frame; the bidirectional drilling devices are arranged along the horizontal guide rails in sequence; row pitch adjusting mechanisms used for adjusting the positions of the bidirectional drilling devices are also arranged on the frame. Due to the arrangement of the bidirectional drilling devices and the row pitch adjusting mechanisms, a plurality of rows of holes can be formed while row pitches are controlled under the premise that the workpieces cannot move, so that the operating efficiency is high; the drilling positions of the holes in all the rows are aligned, so that the processing quality is effectively improved.