Thirty-four percutaneous lumbar discectomies (PLD) were performed in 30 cases of lumbar disc herniation.The cure rate was found to be 50%, total effective rate was 93% with no severe complications.The total effective rate was 100% for buldging of lumbar disc and mild disc herniation, while the total effective rate was only 60% for severe disc herniation and extrusion or sequestration.The value of magnetic resonance imaging in selecting patients for PLD and the entry route selection were discussed