Magnesium is one of the lightest metals in the metal group. It was also widely used in manufacturing and medical applications. Therefore, a material model that could be applied to finite elements was needed before product manufacturing. This paper discusses Johnson-Cook based material modeling of pure magnesium. This testing method used a hot compression test with different temperatures and strain rates by using a Universal Testing Machine (UTM). The temperatures used are room temperature, 150, 250, 350, and 450 0C. While the strain rates are 0.001, 0.01, 0.1, 1, and 10/s. The specimens were solid cylinders with a ratio of 1.5 (length to diameter). The specimen is first held at a certain temperature and then compressed until it reaches half its original length. This test produces an equation with basic Johnson-Cook parameters (A, B, C, n, and m), which is compared with the experimental results. In addition, the numerical simulation model performed for this test has been successfully validated using relevant experimental results. So that, this equation also has a similar pattern and good agreement with the experimental test results. ©Published under licence by IOP Publishing Ltd.