A method for implementing a long reach passive optical network,LR-PON, comprising: receiving an uplink burst packet transmitted by an optical network unit,ONU, in a burst manner (101, 401); converting a burst optical signal of the uplink burst packet into a continuous optical signal; and transmitting the continuous optical signal to a receiving device; wherein the converting the burst optical signal of the uplink burst packet into the continuous optical signal comprises: adjusting optical power of the burst optical signal of the uplink burst packet, and converting the adjusted burst optical signal into an electrical signal; amplifying and shaping the electrical signal; performing clock data recovery on the amplified and shaped electrical signal; and converting the electrical signal after the clock data recovery into the continuous optical signal, and amplifying the continuous optical signal; wherein the step of converting the electrical signal after the clock data recovery into the continuous optical signal and amplifying the continuous optical signal comprises: determining an inter-packet gap between the uplink burst packet and a next adjacent burst packet; filling non-Consecutive Identical Digits,non-CID, bit information in the inter-packet gap, wherein a length of continuous 0 or 1 in the non-CID bit information does not exceed a clock data recovery capability of the receiving device; and converting the electrical signal after being filled with the bit information into the continuous optical signal, and amplifying the continuous optical signal. receiving an uplink burst packet transmitted by an optical network unit,ONU, in a burst manner (101, 401); converting a burst optical signal of the uplink burst packet into a continuous optical signal; and transmitting the continuous optical signal to a receiving device; wherein the converting the burst optical signal of the uplink burst packet into the continuous optical signal comprises: adjusting optical power of the burst optical signal of the uplink burst packet, and converting the adjusted burst optical signal into an electrical signal; amplifying and shaping the electrical signal; performing clock data recovery on the amplified and shaped electrical signal; and converting the electrical signal after the clock data recovery into the continuous optical signal, and amplifying the continuous optical signal; wherein the step of converting the electrical signal after the clock data recovery into the continuous optical signal and amplifying the continuous optical signal comprises: determining an inter-packet gap between the uplink burst packet and a next adjacent burst packet; filling non-Consecutive Identical Digits,non-CID, bit information in the inter-packet gap, wherein a length of continuous 0 or 1 in the non-CID bit information does not exceed a clock data recovery capability of the receiving device; and converting the electrical signal after being filled with the bit information into the continuous optical signal, and amplifying the continuous optical signal. adjusting optical power of the burst optical signal of the uplink burst packet, and converting the adjusted burst optical signal into an electrical signal; amplifying and shaping the electrical signal; performing clock data recovery on the amplified and shaped electrical signal; and converting the electrical signal after the clock data recovery into the continuous optical signal, and amplifying the continuous optical signal; wherein the step of converting the electrical signal after the clock data recovery into the continuous optical signal and amplifying the continuous optical signal comprises: determining an inter-packet gap between the uplink burst packet and a next adjacent burst packet; filling non-Consecutive Identical Digits,non-CID, bit information in the inter-packet gap, wherein a length of continuous 0 or 1 in the non-CID bit information does not exceed a clock data recovery capability of the receiving device; and converting the electrical signal after being filled with the bit information into the continuous optical signal, and amplifying the continuous optical signal. determining an inter-packet gap between the uplink burst packet and a next adjacent burst packet; filling non-Consecutive Identical Digits,non-CID, bit information in the inter-packet gap, wherein a length of continuous 0 or 1 in the non-CID bit information does not exceed a clock data recovery capability of the receiving device; and converting the electrical signal after being filled with the bit information into the continuous optical signal, and amplifying the continuous optical signal.