The present invention discloses an adjustable multi-shaft borer device that is extensively applicable to the field of hole machining. The adjustable multi-shaft borer device comprises a driving big gear (1), driven pinions (2), a main gear shaft (3), a pinion shaft (4), a big gear fixing bearing (5), pinion fixing bearings (6), a fixed support plate (7), tripods (8), transmission links (9), link transmission connecting shafts (10), a baffle plate (11), an L-shaped fixed iron piece (12), a drill bit (13), and a motor (14). The driving big gear (1) is connected to the motor (14) to put the whole device in motion; the driving big gear (1) is peripherally and uniformly engaged with three or more driven pinions (2); when the driven pinions (2) rotate, three or more tripods (8) are put into rotation; a drill rod and the corresponding drill bit are fixedly connected to the middle of the tripod (8) at the outermost end; and the whole adjustable multi-shaft borer device is thus formed. The adjustable multi-shaft borer device has the characteristics of simple structure, achievable wide-range adjustment of the position of the drill bit, and the like.