Fixing device, installation device and installation method for sensor

The invention discloses a fixing device, an installation device and an installation method for a sensor. The fixing device for the sensor comprises a bearing piece and a clamp support, wherein the rear end of the bearing piece is provided with a connecting part; the connecting part is connected with the front end of the sensor through a connecting piece; an opening is formed at the front end of the bearing piece and is used for adhering an adhesive in the bearing piece to a fixed object so as to fix the sensor; the front end of the clamp support is provided with a clamp support fastening piece; the clamp support fastening piece is used for engaging the front end of the clamp support with the rear end of the sensor; and supporting pieces are uniformly arranged on a side wall of the clamp support in the same height and are used for fixedly supporting the sensor connected with the front end of the clamp support. In the fixing device for the sensor, the sensor is fixed at an installation position for a long time, so that the service time of the sensor is prolonged.