The invention relates to a concurrent flow type double-hearth limekiln, comprising a double-hearth limekiln body, a feeding device, a discharge device, an air supply system, a fuel feeding system and an exhaust emission system. A preheating zone, a burning zone and a cooling zone are arranged in a hearth at each side in the limekiln body, each burning zone of each hearth is provided with a burner nozzle. The fuel feeding system is provided with a steering device and a steering storage tank which is a floating roof tank, the inlet of the steering device is connected with the outlet of a Roots blower, one side of the outlet is connected with the burner nozzle through a three-way valve, and the other side of the outlet is connected with the steering storage tank. A bypass is arranged between a connecting pipeline of the steering device and the steering storage tank and the inlet of the three-way valve, and a valve is arranged on the bypass. In the concurrent flow type double-hearth limekiln, by arranging the steering storage tank and the bypass, fuel gas is discharged to the steering storage tank in the steering process, and gas discharged by the steering storage tank and the fuel gas enter the limekiln together when the fuel gas is fed, so that the fuel gas is prevented from being discharged to the atmosphere in the steering process, the fuel is saved, the production cost of lime is reduced, pollution to the atmosphere is reduced, and the environment is protected.