Test data curve analysis comparative method

The invention discloses a test data curve analysis comparative method. The test data curve analysis comparative method includes the following steps that after minor overhaul or major overhaul is conducted on electric equipment at different stages and when a preventive test is conducted, actual measured values acquired through the test conducted by detection equipment are input into an Excel form for storage, filing and retention; based on the Excel form, equation editing is conducted, a computational equation is set, and the actual measured values over the years are converted to obtain conversion values; data curves of the conversion values over the years are generated respectively by the utilization of the Excel functions; the corresponding relations between the data curves of the conversion values over the years are compared, and the defects of the electric equipment are looked for. The test data curve analysis comparative method has practicality, comparability, timeliness and operability.