The invention relates to a cable paste coating device. The cable paste coating device comprises a cable paste coating system (30) and a stable oil supplying system (31), wherein the stable oil supplying system (31) continuously supplies stable cable paste to the cable paste coating system (30), and when a steel strip or aluminum strip (32) passes through the cable paste coating system (30), the cable paste coating system (3) can discontinuously coat the surface of the steel strip or aluminum strip (32) with cable paste. The cable paste coating device provided by the invention adopts the stable oil supplying system, and usage amount of the cable paste provided by the oil supplying system is matched with production line speed, so that uniformity of the amount of the cable paste coated on the surface of the steel strip is guaranteed; meanwhile, adjustment of the cable paste coating device is convenient and reliable, so that the usage amount of the cable paste is greatly reduced, and quality loss caused by breakage of a cable core during yarn gathering is reduced.