The utility model discloses a portable constant temperature communications optical cable fibre core butt fusion platform that prevents dust, it includes temperature controller, temperature sensor and fan or radiator fan, and its adaptation position that lies in the operation panel lower extreme is equipped with folding supporting leg, and the operation panel upper end is equipped with the dust cover, and pass through the joint strip reciprocal anchorage, and this operation panel still is equipped with the temperature control system who comprises temperature controller, temperature sensor and heater, and temperature sensor and heater link to each other through wire and temperature controller respectively, and locate the adaptation position in the dust cover, and the adaptation position of dust cover outside is located to the temperature controller. The utility model discloses can make communication maintainer carry out the butt fusion of optical cable fibre core to outdoor high -quality a large amount, solved since winter the temperature cross lowly or wind sky dust and sand great and caused unable open air and maintain the difficult problem of optical cable, improved the speed and the efficiency of communications optical cable maintenance greatly, and convenient to carry, safe, practicality, convenient is is promptly especially adaptedly popularized and applied in optical cable butt fusion work.