The utility model relates to an insulation line non-contact detection device which comprises a power supply, a signal receiving port and a handle. The power supply is arranged in a handle cavity. The transmission line insulator non-contact detection device further comprises a circuit board. The circuit board is fixed in the handle cavity through a fixing member. The circuit board is fixed in the handle cavity. A sensor, an analog circuit, a digital circuit, a memory device, a data output interface and an audio output interface are arranged on the circuit board. The signal receiving port is in a trumpet-shaped structure whose radius increases gradually, wherein the smallest radius end of the trumpet-shaped structure is connected with a connection part. The connection part is connected with the handle. The sensor is arranged in the connection part. The insulation line non-contact detection device provided by the utility model has the advantages that an ultrasonic sensor, a temperature sensor and a humidity sensor are built in the device; an acquired analog signal is converted into a digital signal; and through the analysis of the digital signal, the deterioration degree of a line insulator is determined.