The utility model relates to a can improve the over -and -under type electric energy meter box mounting bracket of ammeter case installation effectiveness, which comprises a base, the below of base is provided with ladder and support column respectively, the top of the montant of ladder articulates on the base, the fixed setting on the base in top of support column, the spout has been seted up on the lateral surface near ladder one side of support column, be provided with the slider in the spout, the tip and the backup pad fixed connection of slider, be provided with the connecting wire in the backup pad, the bottom and the backup pad fixed connection of connecting wire, the middle part of connecting wire is provided with the spheroid, spacing hole has been offered on the spheroid, the through -hole has been seted up on the base, the storage tank has still been seted up on the upper surface of base, still be equipped with the fixed column on the upper surface of base, fixed column and spacing hole looks adaptation, the upper surface of through -hole and projection play base is passed on the top of connecting wire, the one end of the projection play base upper surface of connecting wire is provided with the bracelet, the spheroid can pass the through -hole on the base and the bracelet can not pass the through -hole on the base.