Coconut coir is natural fiber extracted from the hard, internal shell and the outer coconut and containing lignin to use the raw material of all-chemical industries. Lignin took by alkaline delignification step and then isolation process with acidity circumstance. Thatalkalinedelignificationproceed by NaOH solution is concentrated verify 15%-35% and time term is 60–150 minutes. Lignin isolation proceeds by H2SO4 solution 20% and the last process is purification. Lignin analysis used to Klason Method which the result has shown of the highestyieldof37. 16% with NaOH solution 25% and time term is 120 minutes.