The invention belongs to the field of hydraulic pressure, and relates to a two-stage corrugated pipe type pressure vessel capable of displaying volume. The pressure vessel comprises an outer cylinder (1), a convex seal head (2), a concave end cover (3), a primary corrugated pipe (4), a secondary corrugated pipe (5), a primary convex cover (6), a secondary convex cover (7), a connecting seat (8), a connecting flange (9), an indicating device (10), an oil inlet / outlet (11) and an inflation valve (12). The pressure vessel is suitable for the fields of pressure accumulators, pressurizing oil tanks and the like needing volume compensation and pressure stabilization, has the characteristics of small volume, high volume utilization rate, large expansion and contraction amount, strong volume compensation capability and good oil supply, and is low in manufacturing cost, high in material utilization rate, less in welding seam quantity and good in reliability. Meanwhile, a measuring range of an indicating device is shortened by adopting a primary corrugated pipe and a secondary corrugated pipe, and the overall size is shortened.