The invention discloses a split plug-in type surface acoustic wave temperature sensor, which is characterized by comprising a surface acoustic wave temperature sensing chip, a ceramic antenna, a sensor shell, an arc-shaped upper bracket, a groove-shaped lower bracket and a heat-conducting gasket, the surface acoustic wave temperature sensing chip is fixedly connected to the side surface of the ceramic antenna; the ceramic antenna is arranged in the sensor shell; the internal space of the sensor shell is matched with the ceramic antenna; the ceramic antenna is fixed on the top surface of the arc-shaped upper support, the sensor shell, the arc-shaped upper support and the groove-shaped lower support are connected through screws, and the heat-conducting gasket is arranged at the bottom of the groove-shaped lower support. The ceramic antenna is used as a built-in antenna of the surface acoustic wave, the height of the antenna is greatly reduced, the sensor is only 10mm higher than the chrysanthemum head after being mounted, the mounting requirement of a moving contact is met, and an up-and-down double-clip type mounting method is adopted, so that the sensor is ensured to be in close contact with the chrysanthemum head at any time, keep equipotential and be not damaged by high voltage of the chrysanthemum head after being mounted. According to the invention, reliable temperature monitoring of the moving contact by the surface acoustic wave temperature sensor is realized.