Metal fuel battery and fuel battery system thereof

A metal fuel battery comprises a reactive metal powder negative electrode, air positive electrodes, an electrolyte and a battery shell. The metal fuel battery is characterized in that the metal powder negative electrode is composed of a negative electrode frame, metal powder and a negative electrode current collector, the negative electrode frame is arranged inside the battery shell, a metal powder charging opening is formed in the upper portion, the parallel air positive electrodes are arranged on the two outer sides of the negative electrode frame, a metal powder negative electrode material charging opening and an electrolyte feeding inlet are formed in the top of the battery shell, an electrolyte discharging outlet is formed in the bottom of the battery shell, and an air inlet and an air outlet are formed in the battery shell. A metal fuel battery system comprises a set of metal fuel batteries. The metal fuel batteries are connected in series or in parallel to form a fuel battery stack, battery monomers are connected with a metal powder charging groove and an electrolyte storage groove, and the electrolyte is circulated and filtered through a liquid flowing pump. The metal fuel battery is provided with the reactive metal powder negative electrode capable of achieving continuous charging, no metal electrode needs to be replaced, power generation can be continuously performed, the cost is low, and environmental protection is achieved.