The invention discloses a sisal shoe rope. The sisal shoe rope is weaved by sisal yarn, and the sisal yarn is spun by sisal fiber. The preparing method of the sisal fiber comprises the steps of 1, cutting each fresh sisal leaf into two sections, uniformly mixing the sisal leaves with calcium chloride powder, using a grinder to grind the sisal leaves, thoroughly washing the sisal leaves, placing the sisal leaves into a first reaction kettle, adding a sulfuric acid solution, increasing the pressure to 300KPa, and conducting heating till the sulfuric acid solution is boiled; 2, thoroughly washing the sisal leaves obtained in the step 1, placing the sisal leaves into a second reaction kettle, mixing sodium persulfate powder, adding water, increasing the pressure to 200KPa, and conducting heating till the persulfate solution is boiled; 3, thoroughly washing the sisal leaves obtained in the step 2, placing the sisal leaves into a third reaction kettle, adding a sodium hydroxide solution, increasing the pressure to 300KPa, and conducting heating till the sodium hydroxide solution is boiled; 4, thoroughly washing the sisal leaves obtained in the step 3, and conducting drying, so that the sisal fiber is obtained. The obtained sisal shoe rope resists friction and corrosion, does not easily break and is long in service life.