The utility model discloses a novel telescoping low-voltage pliers-shaped ammeter. The ammeter comprises a housing and an insulation telescoping rod fixedly connected to the bottom part of the housing. The bottom part of the telescoping rod is provided with a data display instrument that is connected to a straight-through current transformer through a connection wire inside the telescoping rod, wherein the current transformer is disposed in the housing. The housing is an enclosed annular body formed by a fixed housing and a rotary housing fixed to the fixed housing. The fixed housing is fixedly connected to the telescoping rod. The inwall of the fixed housing is provided with a fixed coil. The rotary housing is fixedly provided with a rotating coil. In the normal state, the fixed coil and the rotating coil form an enclosed annular coil. The ammeter is suitable for measurement of current in the low voltage side of a transformer in a power distribution transformation stand and a load in a branch line. The ammeter is safe, efficient and convenient in usage.