The invention discloses an electric operating bed and relates to an electric operating bed with an excessive long lifting distance, in particular to improvement of a lifting device of the electric operating bed. According to the provided electric operating bed with the excessive long lifting distance, the working height stroke reaches 500-950 mm, and a bed board can meet the requirement for operation stability when the bed board stays at any position in the whole height stroke. The electric operating bed comprises a base and a seat plate, wherein a lifting structure is arranged between the base and the seat plate and includes parallel inner and outer column devices at the two stages, wherein the parallel inner and outer column devices at the two stages comprise an inner column A, an outercolumn A, a lifting oil cylinder A, a connecting plate, an inner column B, an outer column B and a lifting oil cylinder B; the bottom of the inner column A is fixedly connected to the base, and the outer column A sleeves the inner column A slidably. The electric operating bed effectively enlarges formation and facilitates the adjustment and control of internal clearances of the two inner and outercolumn devices.