The invention provides a bolt cantilever five-axis platform for machining a clock shell, and relates to the technical field of numerical control rotary tables. The bolt cantilever five-axis platform for machining the clock shell includes a hollow four-axis lathe, a five-axis cantilever, a servo motor, a bolt mechanism, a rotary clamp disc, a speed change device, a clamp positioning disc and a clock shell clamp. According to the bolt cantilever five-axis platform for machining the clock shell, a positioning column which moves retractably and a positioning groove which moves rotatably are adopted to accurately and repeatedly locate the rotary clamp disc, then, the clock shell is fixed through the clock shell clamp, and therefore the clock shell is accurately machined on the bolt cantilever five-axis platform.