The test study on temperature characteristic of an engine anti-icing sensor is carried out in the icing wind tunnel. The results of temperature characteristic changing with air total temperature， heat air flow， heat temperature as well as the droplet parameters are obtained. The experimental results show that the heat air parameters have great effect on the temperature characteristic of the sensor， and the average measuring deviation of the sensor increases as the heat air temperature and flow increase. Sensor application scenario is affected by the aircraft engine operation. In certain conditions， the average measurement deviation of the sensor fluctuates in a reasonable range. The ice formed on the sensor will affect the air flow into the sensor temperature cavity， and cause the increase of the sensor temperature deviation. This will finally lead to the decrease of the sensor performance and even failure of the sensor if the ice amount is too much.