A assembling apparatus includes an electric cabinet, a manipulator, a conveying assembly, and a distribution assembly. The manipulator is controlled by the electric cabinet. The conveying assembly includes a vibration plate and a guide rail, the vibration plate is controlled by the electric cabinet. The distribution assembly includes a driving apparatus, a distribution board, and a connection board, the driving apparatus is directed by the electric cabinet, the guide rail is connected between the vibration plate and the connection board, and the distribution board is connected to the driving apparatus. The vibration plate conveys workpieces to the guide rail, the driving apparatus drives the distribution board to communicate with the connection board, the workpieces pass through the connection board and the distribution board, and the manipulator lifts the workpieces from the distribution board.