The invention discloses a heat transfer test system for simulating a multi-channel dryer in a rotating state. The heat transfer test system belongs to the technical field of condensation and heat transfer experimental measurement. According to the heat transfer test system, a channel assembly is connected with a steam system, a coolant system and a control system; the steam system provides steam and forms a steam circulation loop, the coolant system provides a coolant and forms a coolant circulation loop, flow data, temperature data and pressure data are acquired by means of a temperature measuring device and a temperature and pressure acquisition module when the steam circulation loop and the coolant circulation loop reach a balance state, and the acquired flow data, temperature data andpressure data are analyzed, thus the channel pressure drop and condensation and a heat transfer coefficient can be calculated. By changing the pressure and flow of the steam, the heat transfer properties of the multi-channel dryer under different pressure and flow conditions are simulated; and the heat transfer test system is reasonable in design, easy and convenient to operate, and capable of providing a theoretical basis for researching the heat transfer properties of the multi-channel dryer.