The invention relates to an electrode boiler adopting the current control manner. The electrode boiler adopting the current control manner is a small electrode boiler capable of implementing the current control manner, and the electrode boiler is of a structure that fossilized water is utilized as an electrolyte solution, water in a water pipe is heated, electrode bars and a warm water pump are arranged, water enters from a water inlet pipe and is discharged out of a water outlet pipe, and a cycle is formed. The multiple electrode bars are arranged in the water pipe, the area of the electrode bars is adjusted from various outer electric heating pipes, the resistance is changed, and accordingly current consumption is controlled. According to the provided electrode boiler adopting the current control manner, the electrode bars arranged in the water pipe can be adjusted, the resistance is adjusted by controlling increasing and decreasing of the area of the electrode bars, and the beneficial effects that equipment cost is not increased, the equipment size is not increased, and the current can be accurately and simply controlled are achieved.