Drilling machine for large-diameter down hole hammer

The invention discloses a drilling machine for a large-diameter down hole hammer. The drilling machine comprises a chassis (1), a jib lubbing mechanism (4), a main rolling steel wire rope (8), a mast (5), a power head (9), a gas inlet channel (6), a drill stem (14) and a goose head (7), and further comprises a group of sleeves (13) which can be inserted into drilling holes, and a deslagging head (11), wherein the power head (9) is mounted on the mast (5) by adopting a forerake and sidesway structure; the deslagging head (11) can be in butt joint with the upper ends of the sleeves (13); the upper end of a deslagging tube (12) is connected to a slag outlet of the deslagging head (11); the lower end of the mast (5) is provided with a telescopic front supporting leg (17); and a pile gripper (18) is connected with the telescopic front supporting leg (17). The drilling machine is reliable in performance, complete in function, high in degree of automation, capable of realizing entire process supervising for large-di