The invention discloses an automatic detector applied to the high-temperature aging test of an airborne sensor. The automatic detector comprises a control module, an input and output module and a testmodule. The test module processes a simulation signal. The test module conducts marshalling control on a test channel and provides constant current power supply to the test channel. The test module detects the resistance of a to-be-tested device. The input and output module operates an instrument and displays test data. The control module includes a processor, an AD data converter and a storage device. The control module acquires data through the AD data converter, and determines faults based on the computing of the result of data acquisition. The storage device saves historical data of the test. According to the invention, the automatic detector herein changes the conventional manual recording, can automatically test and record respective parameters in the high-temperature aging test, can also integrate automatic determination of pseudo soldering and disconnection of the airborne sensor to the detector, and increases working efficiency.