The invention relates to a forward-mounting reverse-connecting vertical temperature difference cyclic water outlet heating and backwater totally heating method. A hot water supplying circulation system consists of a hot water carrier part (1) and components (2) (3) (4) and (5), and hot water absorbing heat in a boiler transmits heat energy by the upgrade of 0.05%. Hot water supplying connection circulation systems (6) and (9) transmit heat energy downwards vertically by temperature difference. A heat dissipation backwater circulation system consists of (7) (8) (13) (10) (11) (12) and the water carrier return condensation part of (1). The '0' point construction coordinate of a water return port of the boiler is the lowest position of backwater circulation, (8) is connected with (7) in series, the tail end of (8) is connected with (9), (an over threshold-shaped pipeline is arranged when necessary) all the circulation pipelines are arranged according to pipeline gradient required by heat circulation in the process of the heat energy transmission and the construction and installment of corresponding pipeline caliber paths, the circulation system does not need to be provided with a pipeline pump to take effect, and the overall heating circulation system can transmit heat energy in a total heat circulation mode.