The utility model discloses a rotatable trolley for circular tunnel grouting and drilling. The rotatable trolley is mainly composed of a base frame, a rotary drilling machine rack and two grouting operation platforms. Wherein the base frame is used as an integral support of the rotatable trolley; the rotary drilling machine rack is positioned above the base frame and is fixedly connected with thebase frame; the two grouting operation platforms are located on the two sides of the rotary drilling machine rack. The rotary drilling machine rack is mainly composed of a supporting frame and a rotary disc. The turntable is sleeved on a rotating shaft of the support frame through a shaft sleeve; therefore, under the driving of the rotating shaft; the turntable can freely rotate relative to the base frame and the grouting operation platforms on the two sides; accordingly, angle adjustment of the four down-the-hole drills in the rotary disc relative to the circular tunnel is achieved, drillingoperation at any angle in the circular tunnel is completed, the problems that a drilling machine is inconvenient to move on a bent frame, consequently, drilling and grouting angle adjustment is slow,and the construction progress is delayed are effectively solved, and the beneficial effects of being reasonable in design, convenient to use, high in drilling efficiency and the like are achieved.