The invention discloses a coulombmeter case, which comprises at least two case bodies, a case cover and other assembly devices, wherein the lower part of each case body is provided with a routing channel, a routing channel clapboard and a switch base; the routing channel clapboard divides the routing channel into an upper layer and a lower layer; moreover, the lower end of each case body is divided into a wire lead-in chamber and a wire lead-out chamber through a vertical clapboard and a wire-pressing block. The coulombmeter case has the characteristics of safety, economical efficiency, electricity stealing prevention, multiple functions, simple manufacturing process, strong commonality and flexible configuration, etc.