The invention discloses a hydraulic anchor drill rig and a three-working-position propelling beam thereof. The three-working-position propelling beam comprises a fixing beam, a rotating beam, a drilling device, an anchor rod device and an anchoring device; the rotating beam comprises a pushing rod, a sleeve and a plurality of connecting pieces; the sleeve is mounted on the fixing beam in a sleeving manner and can rotate relative to the fixing beam; the drilling device and the anchor rod device are respectively positioned on the two sides of the anchoring device; the pushing rod is driven by aswitching oil cylinder to rotate with the fixing beam as a central shaft; and moreover, in the drilling operation, the anchoring operation, the anchor rod operation and the rotating process of the rotating beam, the top end of the fixing beam always abuts against a tunnel roof needing to be anchored to be fixed. Through the technical scheme, the switching speed is greatly increased, and moreover,the angle accuracy and the locating accuracy in the switching process can also be guaranteed; and meanwhile, the whole vehicle cost can also be effectively reduced, and the three-working-position propelling beam is beneficial for further popularization of underground support mechanization.