Magnetic reconnection is an important basic physics progress, and laser driven magnetic reconnection experiment is a major research method. Proton radiography can accurately measure the magnetic filed of plasma, and it has been widely used in laser driven magnetic reconnection experiment. Currently, there are two methods to reconstruct the magnetic field from the experimental proton radiograph, ie. flux analysis and particle tracing. At the beginning, the researches only obtain the magnetic field qualitatively. With the development of technology, at present the accurate strength and distribution of magnetic field in the reconnection region can be reconstructed. It supplies many possibilities in the research of magnetic reconnection. This paper reviews several important results measured by proton radiography in laser driven magnetic reconnection experiments, and aims to provide a reference for researchers in related fields.