The invention discloses a high-efficiency double-vertical-pot gas-liquid reverse-flow exchange mechanism, and relates to technical structures that according to the relation separation between pots and a furnace, the pots are managed independently, the furnace is managed independently, the pots and the furnace fulfill duties respectively, and the optimal efficiency is achieved. The mechanism comprises a high-temperature pot and a low-temperature pot which are separated in order to improve efficiency of the pots. The lower portion of the high-temperature pot is movably connected with a
flame releasing opening of a furnace, the lower portion of the low-temperature pot is connected with a gas-dust chamber, the gas-dust chamber is connected with a
discharge pipe, the upper portion of the high-temperature pot is fixedly connected with the upper portion of the low-temperature pot in a gas-communication and liquid-communication mode, an inlet for cold liquid is limited to be a
smoke outlet, and a high-temperature
flame gas inlet is limited to be a hot water or steam outlet. For combination of the pots and the furnace, an
assembly latch and an eccentric wheel pull buckle are combined, in this way, rapid connection and rapid separation can be achieved, boiler failures can be rapidly removed, and recovering of normal operation is rapid. The defects that for all kinds of present fuel
combustion boilers, due to failures, the boilers stop working and quench, and then time is delayed, and
dirt at dead corners inside the boilers is difficult to clear away are overcome, more importantly, liquid-gas reverse-flow exchange is adopted so that the highest exchange efficiency can be achieved, the discharging temperature of
smoke is higher than the injection temperature of the liquid by about 20 DEG C, and the technology achieves the lowest discharging temperature of boiler
smoke at the present.