Objective To observe the effect of the treatment of LIDP with Backward pulling and extension manipulation. Methods 37 patients suffering from LIDP were randomly divided into an experimental group of 19 patients，treated with both basic manipulation and backward pulling and extension manipulation， and a control group of 18 patients，treated with both basic manipulation and oblique Traction， outcomes were evaluated by signs quantitative score before treatment， 1 day，3，10， and 20 days after treatment. Results Compared with control group， the efficacy of experimental group had obvious advancement. There was no statistics difference of clinical between the two groups（0. 01＜P＜0. 025）. Conclusion Backward pulling and extension manipulation was positioning more accurate，high safety and efficacy in the treatment of LIDP.