The invention relates to a luxurious full seat three-layer coach carriage which is formed by transforming a double-layer coach into three layers based on the principle that the height of 4.2 m of a coach body is not changed. The luxurious full seat three-layer coach carriage comprises a first layer, a second layer and a thirst layer of the coach carriage, a left coach door and a right coach door are arranged on the first layer of the coach carriage and used for passengers on the first layer to get on and off a coach conveniently, the left coach door and the right coach door are built-in embedded type electric coach doors, and stairs, transition platforms and the like are arranged specially for the passengers on the second layer and the third layer to get up and off the coach. A coach type comprises two structures which are the perpendicular lifting shed cover type structure and the opening angle through ceiling cover type structure. The passengers have luxurious and comfortable feelings when taking the coach, the coach is suitable for natural travel coaches and shuttling coaches for remote personnel of big sports events and the like. The luxurious full seat three-layer coach carriage has the greatest advantage that due to the increase of the layers, the numerical value obtained through calculation of the passenger average coach body occupied area can be smaller than the numerical value obtained through the corresponding calculation of a single-layer coach and the double-layer coach, and obviously the positive effect can be achieved on relieving urban traffic pressure.