This invention discloses a dyeing method for 100% polyester spun polar fleece with wool as the raw material including a first process and dyeing, when dyeing, the pH value of the dye bath is adjusted to 6-7, then acid color and aid are added to be operated for 5-15 minutes under 35-45deg.C then to be warmed up in the rate of 0.5-1.5deg.C/minute and the temperature is kept for 20-35 minutes at 50-65deg.C then to be heated to 90-100deg.C in the same rate to be kept for 30-45 minutes, finally the temperature is reduced to 40-60deg.C in the same rate to be cleaned with hot and cool water.