The invention discloses a power transformer core magnetic characteristic measurement and analysis device which comprises a voltage collecting module, a current collecting module, a magnetic flux collecting module, a frequency generator module, an electrical isolation module, a central processing module and a fault protection module. The frequency generator module generates a synchronously sampledpulse signal according to a collected signal. After sampled data are A/D-converted, an analog signal is converted into a digital signal. The digital signal is transmitted into the central processing module. Automatic integration calculation with base line correction is carried out on a voltage signal to acquire a magnetic flux signal. Data conversion calculation is carried out on a current signalto acquire the magnetic field intensity. Numerical conversion calculation is carried out the magnetic flux signal to acquire the magnetic induction intensity. Problems in power transformer core remanence test and analysis in the prior art are solved.