A split type field metallographic microscope includes an independent microscope base and a microscope body with an optical system component, a steering adjusting support is detachably connected between the microscope base and the microscope body and includes two long-strip-shaped clamping plates through which clamping adjusting bolts penetrate, and rotatable left ball body and right ball body are clamped at left and right ends between the clamping plates; the left side of the left ball body is connected with an adjusting rod, a base fixing member is arranged on the adjusting rod in a penetrating manner, and the base fixing member is connected with the microscope base; the right side of the right ball body is connected with a microscope body fastening sleeve which is connected with the microscope body, and the bottom part of the microscope base is provided with a magnetic base. The beneficial effects are that the split type field metallographic microscope adopts a split type structure, thereby facilitating adjustment of positions and angles of the microscope body, rapidly and effectively allowing the optical system of the microscope body to be vertical to a to-be-detected surface, ensuring the metallographic structure of a whole field of view to be clear, and obtaining high imaging quality.