Efficient finned tube heat exchanger

The utility model discloses an efficient finned tube heat exchanger which comprises a lower shell, lower installation plates are fixedly installed on the four edges of the top of the lower shell, an upper shell matched with the lower shell is installed on the top of the lower shell, a communicated water inlet pipe is arranged on one side of the top of the upper shell, and a communicated water outlet pipe is arranged on the same side of the bottom of the lower shell. And an upper mounting plate matched with the lower mounting plate is annularly arranged on the outer side of the upper shell. Heat is rapidly transmitted to the connecting pipe through the heat exchange fins, the connecting pipe transmits the heat to the heat exchange plate, meanwhile, water needing to be heated is injected into the left side of the second fixing frame through the water inlet pipe, then gradually overflows the heat exchange plate to flow rightwards, and after reaching the right side, the water flows into the right side of the inte