The invention discloses a method for directly measuring a temperature of the wall of a heating type rotary drum. The method is characterized by comprising the steps of: installing a plurality of thermoelectric couples on different places of the surface of a rotary drum heating sheet, and connecting to a temperature recorder fixed on the out wall of a rotary drum through connecting wires, measuring the temperature of the rotary drum heating sheet in the rotating heating work state of the rotary drum; and then transmitting collected temperature date to a signal receiving end connected with a computer through a remote measurement set in the temperature recorder, and collecting and analyzing the temperature by temperature analysis software installed in the computer. By using the measuring method provided by the invention, temperatures of the walls of heating type rotary drum equipment such as a rotary drum tobacco dryer, a rotary drum charger, a rotary drum conditioning cylinder and the like are monitored in real time online, and temperature data can be recorded, sorted and analyzed in real time, thus change conditions and distribution states of the temperature of the wall of the rotary drum are intuitionally known. According to the method, the recorder is fixed on the outer wall of the rotary drum, thus the recorder is avoided working in a high temperature and high humidity environment in the rotary drum.