The invention discloses a cold-rolled non-oriented electrical steel band and a preparation method thereof. The preparation method comprises the following steps: molten steel undergoes continuous casting and liquid core reduction to form a sheet billet, and the sheet billet directly enters a heating furnace, and undergoes heating and heat insulation; the sheet billet undergoes seven-stand continuous rolling to form a hot-rolled sheet with a thickness of 2.0-2.5 mm; and the hot-rolled sheet undergoes normal pickling, single-stand cold rolling, continuous annealing and coating to obtain the finished electrical steel band with a thickness of 0.5 mm. The obtained cold-rolled non-oriented electrical steel band has excellent magnetic properties, an iron loss P1.5/50 of 3.00 W/Kg or less and a magnetic induction B5000 of 1.68 T or more; and the surface of the steel band has no strips, corrugated marks and other flaws and has excellent quality, so the steel band meets the needs of users.