The utility model relates to a novel drilling machine bottom seat, which comprises a drilling platform (6), an upright post (7), a base seat (8) and an inclined post (15), wherein the drilling platform (6) is composed of a left upper seat (16), a right upper seat (17) and a connecting frame (18) between the two upper seats; the upper end of the upright post (7) is hinged on the drilling platform (6), and the lower end of the upright post (7) is hinged on the base seat (8); both the left upper seat (16) and the right upper seat (17) are provided with a rectangular gap (19) with a backward opening; the upper end of the inclined post (15) is hinged on the drilling platform (6), and the lower end is connected with the base seat (8) in a sliding mode. The utility model can realize the low-level installation and the operation of a winch and can cause a headframe, a bottom seat and drilling platform equipment to be installed on a low level. The utility model lowers the difficulty of installation and disassembly and shortens the time of the installation and the disassembly.