Large-scale propellor

A large-scale propellor comprises a hub, blades, blade roots, following edges, blade tops, and guide edges, wherein the blades are obliquely arranged on the hub; four blades are uniformly distributed on the hub; contacting parts of the blades and the hub are the blade roots; top ends of the blades are blade tops; edges, applying to water, of the blades are the guide edges; edges, corresponding to the guide edges, on the other side are the following edges; the following edges rotate with the guide edges; the thickness of the blades reduces gradually from the blade roots to the blade tops. According to the large-scale propellor, the entire propellor is cast by copper alloy; the diameter of the propellor is 6.1 m; the propellor is mounted on a ship body through the interference fit of the hub and a rotating shaft.