The invention relates to the technical field of gas detection, and particularly, relates to a mutual inspection device for double helium concentration meters. The mutual inspection device includes a first concentration meter, a second concentration meter, a control device and an alarm device; one end of the first concentration meter and one end of the second concentration meter are both connected and arranged between a gas storage tank and an inspection station; the other end of the first concentration meter and the other end of the second concentration meter are both connected with the control device; the control device is connected with the alarm device. The device has the advantages of simple structure and convenient implementation, can effectively confirm whether the concentration meters have fault, has accuracy on a detection result of the helium concentration, can alert an operator to find out whether the device are in a normal working condition in real time, and improves the working efficiency of the operator.