The invention discloses a
tidal current energy power generation device capable of being used in a low-speed environment and relates to a
tidal current energy power generation device. A main
body frame, an energy collection and conversion device and a speed-up drive mechanism are arranged. The main
body frame is provided with floating blocks, floating block support ribs, supporting beams, working platforms, slewing supporting bearings, supporting plates, a main shaft waterproof pipeline and a
leaf blade shaft waterproof pipeline in an erecting mode. The energy collection and conversion device is provided with a front rectification cover, a rear rectification cover, a guide plate, hydraulic
turbine blades and an
electric generator. The speed-up drive mechanism is provided with a main shaft, a front
leaf blade shaft, a rear
leaf blade shaft, a main shaft upper
bevel gear, a main shaft lower
bevel gear, a front leaf blade shaft
bevel gear and a rear leaf blade shaft bevel gear. Fluid
mechanics knowledge is fully used, a rectification cover structure is used for carrying out rectification and acceleration to low-speed
tidal current flowing through the leaf blades, a low-speed tidal current sea area is enabled to be suitable for carrying out power generation, meanwhile, leaf blade ways which are identical in direction and a guide vane structure are adopted, tidal current flowing through the power generation device is enabled to achieve high-efficiency conversion, and the
tidal current energy power generation device capable of being used in the low-speed environment is especially suitable for carrying out high-efficiency conversion to the low-speed tidal current.