The invention belongs to the field of machinery technology, and relates to an eight-axis turntable for electromagnetic window testing. The turntable comprises a rolling ring assembly, a pitching assembly, an upward-and-downward linear assembly, a forward-and-backward linear assembly and a direction assembly. The turntable realizes transverse rolling rotary movement, pitching rotary movement, upward-and-downward elevating movement, frontward-and-backward translational movement and rotation movement of an electromagnetic window product, and realizes transverse rolling rotary movement, pitching rotary movement and rotation movement of a signal source. According to the eight-axis turntable, always perpendicularity between a tangential plane of a random point arm surface of the tested electromagnetic window product and the axis of the emitting surface of the signal source is ensured through eight-axis combined movement; and furthermore a fact that the emitting position of the signal source is always at the circle center of a fixed area arc surface on the tested electromagnetic window product is realized. The eight-axis turntable has advantages of performing real-time compensation on the angle and position error in measurement through eight-axis linkage, realizing accurate measurement and automatic measurement, and more accurately realizing electric performance testing on the electromagnetic window product with large eccentric moment and large dimension.