Torque is main technical index that reflects the output power and performances of transmission shafting，which can provides effective guarantee for reliable operation，fault diagnosis and security maintenance of power equipment via real time monitoring of output torque.It has important implications for torque measurement of transmission shafting.Based on the two kinds of principles of torque measurement in transfer method,strain ( stress) and torsion angle the working principles characteristics and drawbacks of several torque measuring methods and sensor structures that having been researched widely were analyzed in detail.In the future combining with the own characteristics and development of transmission shafting,the torque measurement of transmission shafting should be further developed in the respects: craft improvement of strain gauge testing noncontact measurement measurement of special size shaft method of data handling and design of measurability.