In order to enhance the heat transfer inside the turbine blade and reduce the pressure drop of the channel, a new bubble-shaped divider wall was proposed. An experimental study and numerical simulation was performed to obtain heat transfer and pressure drop characteristics of the channel with different radius and shape of the bubble configuration and typical traditional configuration. Isothermal boundary condition was used. With the scope of the study, it was found that the symmetrical bubble-shaped divider wall can greatly reduce the pressure drop of the channel. As the radius increases, the reduction effect became more obvious. Asymmetric divider wall reduced pressure drop only at maximum radius. The effect of bubble structure on heat transfer was not obvious. The experimental conclusion can provide a theoretical basis for the optimal design of the internal cooling channel of the turbine engine.