Objective: To explore the effects of glucagon-like peptide-2（GLP-2） on intestinal mucosa epithelium myosin light chain kinase（MLCK）of the rat with obstructive jaundice.
 Methods: The obstructive jaundice models of rats were set up. At postoperative 10 d,the control group rats were subcutaneously injected with 0.5 mL PBS; experiment group A with 250g/(kg·d) GLP-2 (0.5 mL),and experiment group B with 125 g/(kg·d) GLP-2 (0.5 mL), b.i.d×7 d,then all the rats were killed The villus height,mucosa thickness and crypt depth of the terminal ileum mucosa were detected. Immunohistochemistry and Western-blot were used to examine the distribution and expression of MLCK. Image analytical system and statistics software were used to analyze the results quantitately.
 Results: The intestinal villi of the  distal ileum mucosa were short and sparse in control group.Compared with control group, the average intestinal villus height,mucosa thickness and crypt depth were increased 27.8%,21.7% and 25.4%(all P＜0. 01) in experiment group A. And the MLCK stainings appeared  discontinuous and vague in control group, but they recovered somewhat in experiment group A. The values of strong positive expression were obviously higher in experiment group A than those in control group (8/10 vs. 2/10, P＜0.05) and experiment group B(8/10 vs. 4/10,P＞0.05). The same outcomes were obtained by quantitative analysing Western blot images. The degression of intestinal villus height and absorbance of MLCK images presented direct correlation.
 Conclusions: The intestinal mucous membrane shows obvious atrophy in obstructive jaundice.Exogenous supplemented GLP-2 can enhance the quantity and distribution of MLCK in intestinal mucosa in obstructive jaurdice, and can restore the morphology of intestinal mucosa epithelium.