Abstract： ObJective To probe whether the 3 dimensional conformal radiation therapy(3DCRT)con- trol postoperative patients with glioma of the brain. Methods To analyze the prostecdtive efficacy and complica- tion of the 3 dimensional conformal radiation therapy on 97 postoperative patients with glioma of the brain retro- spectively. Lamellar scanning brain by CT after fixed the head by MED-TEC face cage, then transfer data to workstation, to draw anatomic structure of target region. Give a certain dosage to the target region. , optimize ther- apeutic regimen by inverse calculate,and then cure by accelerator linear. Combinated with mannitol and hormone therapy. The average total dose of radiation was 25-33 time, with 200 Gy each time, one week five times. Results After the 3 dimensional conforms1 radiation therapy, follow-up visit by clinical symptom show after one year, 93 cases,95.9 percent of clinical symptom improved,3 cases,3.1 percent had no change, 1 cases aggravated, 1.03% percent and none death. Follow-up visit by imageology show : completely elimination 31eases, diminution 50 cases, 14 cases had no change,3 cases aggravated. Follow-up visit by clinical symptom show after two years, 53 cases clinical symptom improved, 12 cases had no change ,21 cases aggravated, 11 cases death. Follow-up vis- it by imageology show:completely elimination 33cases, diminution 25 cases,6 cases had no change ,33 cases ag- gravated. Follow-up visit by clinical symptom show after two years ,46 cases clinical symptom improved, 15 cases had no change,4 cases aggravated,32 cases death. Follow-up visit by imageology show:completely eliminat0ion 33cases,diminution 22 cases. 3 eases had no change,39 cases aggravated. Conclusion All postoperative pa- tients with glioma of the brain were treated by 3DCRT, no palindromia during one year after operation. 3 dime0n- sional conformal radiation therapy is a ideal way to cure the glioma of the brain after operation for its high cura- tive effect and low complication. Three dimensional conformal radiotherapyis ableto prolongthe survival rate andimprovethellfe query of patients with recurrent rectal,the patients are acepetable.