The EGFR of 81 Endomctriosis cases were examed with immunohistochemicalcolouring method. The results indicated that there was no significant relativity between theEGFR positive expression and endometriosis stage, but it had closed relationship with therecurrent of endometriosis and wether the drug was taken preoperation. The measurement ofEGFR had a definited significance to indicate how to treat,With drug and to judge theprognosis of endometriosis.