NOVELTY - The set has a vane (3) that is connected to a main shaft (2) through a connection rod (1). The connection rods and vane define an impeller assembly, such that big end of evenly distributed impeller assemblies is fixedly connected with the main shaft through big end of the rod. A sliding block (1d) at the small end of the connection rod is embedded in a sliding groove (3d) formed in the vane. A step-up gear (4) is fixed on top plate (7a) of protection lid (7) through a support saddle (9). The dynamo (6) is fixed on internal side of the top plate (7a) of the lid.    USE - Foldable power generating set using tidal stream energy.    ADVANTAGE - The volume of the foldable generating set can be reduced, so that transporting convenience of the power generating set can be improved and the need for dismounting of each unit can be prevented, while reducing the equipment cost.    DETAILED DESCRIPTION - The set has vane (3) that is connected to a main shaft (2) through a connection rod (1), so that tidal stream forced on the vanes can rotate the main shaft that drives a dynamo (6) to generate power using a step-up gear (4) and a gimbal (5). The connection rod, vanes and main shaft adopt foldable structures that are locked using locking mechanisms (8). The connection rods and vane define an impeller assembly, such that big end of evenly distributed impeller assemblies is fixedly connected with the main shaft through big end of the connection rod. A sliding block (1d) at the small end of the connection rod is embedded in a sliding groove (3d) formed in the vane. A step-up gear (4) is fixed on top plate (7a) of protection lid (7) through a support saddle (9). The dynamo (6) is fixed on internal side of the top plate (7a) of the protection lid. The lid is fixed by a cement base (13) through the support saddle (13).    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the foldable generating set.    Connection rod (1)    Main shaft (2)    Vane (3)    Sliding groove (3d)    Set-up gear (4)    Gimbal (5)    Dynamo (6)    Protection lid (7)    Locking mechanisms (8)    Support saddle (9)    Cement base (13)