A convective heat transfer flue, including a flue wall (1) and convective heating surface groups (2) arranged inside the flue wall (1), shutters adjustable through 90 degrees or sliding gates (9) are arranged between adjacent convective heating surface groups and at a flue gas inlet and a flue gas outlet of the convective heat transfer flue. The proposed flue solves the problems of fouling within back-flow vortex regions of heat transfer pipes, and condensation on heating surfaces in the tail of the flue wall (1), as well as being beneficial for boiler start-up and load adjustment thereof.