The utility model discloses a conflux baffle plate used for a wet etching device. The conflux baffle plate used for the wet etching device is characterized in that: the bottom of the conflux baffle plate is an opening triangle- shaped structure. The number of the triangle-shaped structure is consistent with the channel number of the wet method machine of the wet etching device matched to the conflux baffle plate. Conflux grooves are arranged on the internal and external sides of the conflux baffle plate. Outlets of the conflux grooves are distributed on the two ends of the conflux baffle plate. The conflux baffle plate is provided with a triangle-shaped inclined plane and the conflux grooves, so that the liquid drop diversion is benefited and the risk that condensation acidic liquid of a wet etching groove drops onto the surface of a silicon chip is solved. The baffle plate gained by adopting the method of the utility model may be used on the conventional device without the need of changing the structure. The usage and the maintenance are convenient.