Objective      To evaluate the effectiveness of single-bundle vs double-bundle posterior cruciate ligament (PCL) reconstruction under arthroscope.       Methods      Randomized controlled trials (RCTs) and non-randomized controlled trials (non-RCTs) of arthroscopic single-bundle vs double-bundle PCL reconstructionpublished in PubMed

Embase

Cochrane library

China national knowledge infrastructure (CNKI)

Chinese biomedical literature database (CBM)

and VIP were searched. All the data were analyzed by 2 reviewers independently using RevMan5.3 software.       Results      The Meta analysis included 323 patients with PCL injure

and there were four RCTs and four non-RCTs. The results of Meta analysis showed that there were significant differences in Lysholm scores [MD=-3.51

95%CI（-4.54

-2.48）

P0.000 01]

Tegner scores [MD=-0.52

95%CI（-0.89

-0.14）

P=0.007]

IKDC normal and nearly normal [OR=0.40

95%CI (0.19

0.84)

P=0.01]

IKDC abnormal and severe abnormal [OR=2.48

95%CI (1.20

5.15)

P=0.01]

and flexion 90°posterior stability [MD=0.92

95%CI (0.18

1.56)

P=0.01]between single-bundle PCL reconstructionand double-bundle PCL reconstruction. However

no statistical significance difference was found in flexion 30° posterior stability [MD=0.63

95%CI (-1.63

2.61)

P=0.54] and postoperative complication rate [OR=0.60

95%CI (0.22

1.62)

P=0.32].       Conclusion      The current clinical evidence shows that single-bundle PCL reconstruction is superior to double-bundle PCL reconstruction

with easy operation

less injure and easily controlled tunnel location

but the flexion 90° posterior stability is inferior to double-bundle PCL reconstruction.