An abnormal brine wedge experiment device is provided to maintain the concentration of salty water and the tide level change of the sea area to be constant. An abnormal brine wedge experiment device comprises a salty water tub(10) where the salty water of a ceratin concentration is filled and is made of a transparent material; a variable slope waterway(20) for the supply of fresh water of the rectangular cross section which is connected to the upper side of the salty water tub and has a certain slope angle and length; a fresh water supply water tank(30) which supplies fresh water of a certain amount to the variable slope waterway; a salty water supply water tank(40) which is connected to the salty water tub to generate the salty water of a certain concentration proportionally to the fresh water amount; a mobile ware(50) which is installed inside the salty water tub to generates the tidal action; and a computer(60) of the rectangular cross section which controls the supply quantity of fresh water and salty water and the tidal action.
