The invention relates to an automatic detection method for broadband power line carrier modules, which includes the following steps in sequence: (1) warehousing-in is requested; (2) a warehousing-in in-place signal is sent; (3) tray data is fed back; (4) test is carried out; (5) warehousing-out is requested; (6) a warehousing-out in-place signal is sent; and (7) a test module sends test data to anassembly line server. The method is compatible with the detection of single-phase and three-phase broadband power line carrier modules, automatic logistics, automatic storage, and the like. The gap in state grid carrier module measurement, automatic production, warehouse logistics and test is filled. The time for carrier replacement between steps can be saved. The waste of time caused by equipment wire replacement can be avoided. The cost of detection equipment can be reduced. The space utilization rate can be improved. Module boxing and un-boxing steps can be avoided. Manual participation can be reduced. The efficiency of product detection can be greatly improved.