The utility model discloses a three -phase separation device combined heating and whole device that keeps warm, include: the jar body, its inside is hollow structure, and the level is placed, the inlet, it sets up the upper portion left side of the jar body, and with jar body intercommunication, the gas outlet, it sets up the upper portion right side of the jar body, with jar body intercommunication can exhaust gas, the liquid outlet, it sets up the lower part right side of the jar body, with jar body intercommunication can discharging liquid, and the steam distribution station, its one end and steam inlet tube intercommunication, and follow the week circle direction setting of the external wall of jar, the companion's heat engine that keeps warm constructs, and it is in along the axial setting the lower part of the jar body, and with the steam distribution intercommunication of standing can be received the heat of steam distribution station transmission, it is right the jar body keeps warm. Guaranteed that the fluid in the inside mobile problem of equipment, adds the nice and warm inside fluidic temperature of three -phase separator that keeps, kept its mobility.