Objective:To study the efficacy of ademetionine 1,4-butanedisulfonate enteric coated tables in the treatment of severe intrahepatic cholestasis in gestation period and its influence on liver function. Methods:From July 2013 to November 2014 in our hos-pital, 122 cases of severe intrahepatic cholestasis patients were divided into the observation group (61 cases) and the control group (61 cases) according to the admission order. The two groups of patients were given the conventional treatment, and the observation group was treated with ademetionine 1,4-butanedisulfonate enteric coated tables additionally. The clinical efficacy, pruritus, perinatal child and pregnancy outcomes were observed after the treatment. The liver function in the two groups before and after the treatment was com-pared. Results:Before the treatment, TB, TBA, DB, AST and ALT in the two groups showed no significant difference (P>0. 05). After the treatment, TB[(22.7 ±4.3) μmol·L-1], TBA [(14.3 ± 3.4) μmol·L-1], DB[(5.3 ± 0.8)μmol·L-1], AST [(73.2 ±13.2)U·L-1] and ALT [(82.5 ±10.3)U·L-1] in the observation group were significantly lower than those in the con-trol group[TB(28.3 ±4.8) μmol·L-1, TBA(21.5 ±5.2) μmol·L-1, DB(8.3 ±2.4) μmol·L-1, AST(245.1 ±38.3) U· L-1, ALT(221.4 ±37.4) U·L-1], and the difference was statistically significant(P<0.05). After the treatment, the total effec-tive rate in the observation group (96. 72%) was significantly higher than that in the control group (80. 33%), the degree of itching in the observation group was significantly lower than that in the control group, the perinatal children and pregnancy outcomes in the ob-servation group were significantly better than those in the control group, and the difference was statistically significant (P<0. 05). Conclusion:Ademetionine 1,4-butanedisulfonate enteric coated tables in the treatment of severe intrahepatic cholestasis during preg-nancy is effective with high security, which can significantly improve liver function, and is worthy of wide application.