The magnetic flux compression technique by explosive cylindrical implosion has the advantages of high loading pressure, small temperature increase during loading process as well as the ability of holding large volume samples. By the virtue of all these characteristics, it has wide applications in the fields of high pressure physics, new material synthesis and ultrahigh magnetic field condensed matter physics. The utility of ultrahigh speed photography technology in the experiment of magnetic flux compression by cylindrical implosion method is reported. The onedimensional and two-dimensional images of compression process of magnetic field with high temporal and spatial resolutions are obtained using ultrahigh speed framing photography and scanning photography techniques. The whole compression and rebound process as well as the interface instability phenomena are observed. By analyzing the dynamical curve of sleeve cylinder′ s diameter, the compression speed of magnetic flux is obtained. The experimental data is an important guideline for the research of future magnetic flux compression technology by cylindrical explosive implosion technique.