Arm for drilling equipment

The invention relates to the technical field of underground drilling equipment, and provides a machine arm for drilling equipment, which is used for being mounted on a drilling rig and comprises a mounting plate, a base plate and an arm, the main arm is arranged on the mounting plate; the drill arm is arranged on the main arm; the working platform is rotationally arranged on the main arm, and the working platform comprises a main beam arranged on the main arm; the number of the side beams is multiple, and the multiple side beams are arranged on the two sides of the main beam correspondingly; the connecting unit is used for connecting two adjacent side beams together; the bottom frame is arranged on the side beams in a sliding manner; the secondary beams are arranged on the side beams in a sliding manner; by means of the technical scheme, the problem that in the prior art, a working platform below a machine arm occupies a large available space on drilling equipment, and consequently the object carrying capacit