The invention belongs to the technical field of drilling machines, and particularly relates to a drilling machine with a deflection mechanism and a using method thereof. The drilling machine comprisestwo sliding block devices, a double-row chain guide rail device, a lifting arm device, a guide sleeve device, a power head device and a deflection device; the guide sleeve device and the power head device are each slidably connected with the lifting arm device through one sliding block device; and the guide sleeve device is detachably connected with the power head device, and when the two slidingblock devices slide, the guide sleeve device and the power head device move synchronously. The using method of the drilling machine comprises the following steps of 1, adjusting the deflection device; 2, adjusting the position of a drill arm; 3, carrying out power output of the two sliding block devices; 4, carrying out power transmission of the two sliding block devices; 5, carrying out power output of the power head device; and 6, drilling the guide sleeve device. The drilling machine is convenient to operate, stable and reliable, long in service life, capable of adapting to most construction sites, and high in adaptability of working sites.