The invention relates to the technical field of civil engineering construction, and aims to provide a multi-way adjustable portable drilling machine bracket. A bearing rack of the bracket is of a frame-shaped structure formed by four bearing rods in a two-to-two welded manner; a drilling machine sliding track is transversely arranged on two opposite bearing rods; one of the bearing rods is moveably connected with the bottom of the drilling machine sliding track through a door hinge; a support angle adjusting rod for supporting the drilling machine sliding track is mounted on the other bearing rod; the top end of the support angle adjusting rod is connected with the bottom of the drilling machine sliding track; support rods of which the lengths are adjustable are respectively arranged below four angle parts of the frame-shaped structure; tops of the support rods are moveably connected with angle parts of the frame-shaped structure; bottoms of the support rods are moveably connected with base foot pads; transverse rods for enhancing stability are arranged between adjacent support rods. By adopting the bracket, any expected drilling angle and drilling direction can be achieved by adjusting the support rods of the drilling bracket, and the bracket is applicable to unsmooth and inclined field conditions and the like. Adjustment can be implemented according to expected drilling angles, and series of engineering problems caused by inaccurate angles can be avoided.