Sheathing wire length coding device

A sleeve line metering jet coding device includes a front supporting roller, a mould, a jet coding device, a rear supporting roller, a wire arranging device, wherein, a core of conductor enters into protective sleeve of the mould through the front supporting roller, the jet coding device will carry out the metering jet coding operation for the protective sleeve, the rear roll is located behind the jet coding device, the core of conductor enters into a pedrail type drawer roller through the rear supporting roller, and finally enters into the wire arranging device; the jet coding device is provided with a signal wheel; the signal wheel consists of a iron wheel packed with rubber externally, and the signal wheel adopts multi-wheel vapor-pressure type signal wheel. The device is high accurate for metering with low data error during operation.