This paper discusses the venturi tube used as a duct wind turbine power plant. The design of the power plant using duct wind turbine method is another alternative in exploiting the potential of wind energy as an environmentally friendly power plant. Before the design of the electric generator is carried out, a simulation and analysis of the geometry of the venturi tube is carried out. The simulations is to find the optimum design for wind speed and energy generated. In this paper, four designs are made, namely a straight design, a bent design on the input channel, a bent design on the input and output channels, and a bent design without sharp corners. To help analyze the designs, the Ansys Fluent is used. The simulation results show that the highest airflow velocity is located in the throat channel and the average velocity ratio between the input channel and the venturi channel is around 5x. Venturi Tubes with Bent Shape on the input and output channels without sharp angles can reduce turbulence in all parts of the channel. © 2023 IEEE.