The invention discloses a force balance type electric cylinder with fluid circulation, comprising a bearing, a screw, a screw nut and an oil cylinder body. The oil cylinder body comprises a cylinder barrel, a front end cover, a rear end cover and a piston rod. The front end cover and the rear end cover are respectively arranged in front of and at the back of the cylinder barrel. A first oil holding cavity is formed between the screw and the piston rod. A second oil holding cavity is formed between the cylinder barrel of the oil cylinder body and the piston rod. A first hydraulic circuit connector and a second hydraulic circuit connector are arranged on the oil cylinder body and are respectively connected with a first one-way valve and a second one-way valve. An energy accumulator is connected between the two one-way valves. The front end of the cylinder barrel is provided with at least a group of first magnetic inductive switches and the rear end thereof is provided with at least a group of second magnetic inductive switches. A tensile hydraulic damping buffer mechanism for limit protection and a retractile hydraulic damping buffer mechanism for limit protection are arranged between the oil cylinder body and the piston rod. The two oil holding cavities, the first one-way valve, the second one-way valve, the energy accumulator and a pipeline are full of hydraulic circulating media with pressure.