The invention discloses a hot-melt pressure-sensitive adhesive for PVC electrical adhesive tape and a preparation method.The hot-melt pressure-sensitive adhesive for the PVC electrical adhesive tape is prepared from, by weight, 10-100 parts of thermoplastic elastomers, 15-100 parts of tackifying agent, 5-50 parts of softener and 0.4-1.5 parts of antioxidant.According to the prepared hot-melt pressure-sensitive adhesive for the PVC electrical adhesive tape, the product is solid, the polarity of the adhesive is appropriate, migration of a plasticizer can be effectively resisted, the hot-melt pressure-sensitive adhesive is prevented from moving to the back of a membrane, and environment friendliness is good.Moreover, due to the fact that the prepared hot-melt pressure-sensitive adhesive is 100% solid without a solvent, cost is low, and after repeated tests in a laboratory and long-time storage on the PVC membrane, the hot-melt pressure-sensitive adhesive still has good pressure sensitivity.Besides, the preparation method of the hot-melt pressure-sensitive adhesive is simple, energy consumption is low, and work efficiency is high.