The electromagnetic force of electromagnetic casting induced in cylindrical molten metal was analyzed by mathematical method and experiment research. It can be concluded that where is the electromagnetic force impose on and what is the direction of the force, and the electromagnetic force was concerned not only with the magnetic flux density but also with the grads of the magnetic flux density. Furthermore, it can be summarized that the nonconservative component of the force was brought by the asymmetry of the distribution of the electromagnetic field. Some experiments are taken to research the influence of the parameters (inductor current, inductor shape etc.) on the distribution of the electromagnetic fields.