The invention provides a fluidized bed methanol to olefin combined device in equal-height arrangement. Aiming at the technological property of fluidized bed methanol to olefin, the device structure and the configuration mode are reasonably designed, and a three-device system including two reactors and one regenerator is selected. A triangle type layout that the two reactors and the one regenerator are all put at the same height is adopted, with the layout, the three devices are positioned on the same height basically, so that the total elevation of the device is reduced, and further the aim of reducing the construction cost is realized. The fluidized bed methanol to olefin combined device in equal-height arrangement is simple in structure, compact in layout, and relatively low in cost, and has a prominent popularization prospect.