A Study of TQA3526 in the Treatment of Primary Biliary Cirrhosis (PBC)

Inclusion Criteria: * 1.18 and 70 years old, male or female. 2.Proven as PBC, as demonstrated by the patient presenting with at least 2 of the following 3 diagnostic factors: * History of increased ALP levels for at least 3 months prior to Day 0 in previously treated PBC patients，or ALP levels increased during screening in treatment naive PBC patients； ② Positive AMA titer (\>1:40 titer on immunofluorescence or M2 positive by ELISA) or PBC-specific antinuclear antibodies (anti-GP210 and anti-SP100 positive)； ③ Liver biopsy consistent with PBC within 24W prior to randomization； 3.ALP value between 1.67 and 10 × ULN; 4.Taking ursodeoxycholic acid (UDCA) for at least 12 months (stable dose for ≥ 3 months) prior to Day 0, or unable to tolerate UDCA (no UDCA for ≥ 3 months) prior to Day 0. Exclusion Criteria: * 1.Has other virus infected ; 2.History or presence of other concomitant liver diseases； 3.Presence of clinical complications of PBC or clinically significant hepatic decompensation； 4.Child-pugh grade B or C in patients with cirrhosis； 5.Creatinine (Cr) ≥1.5 times the upper limit of normal value and serum creatinine clearance rate \<60mL/min； 6.ALT or AST\>5×ULN；TBil\>3×ULN； 7.Patients with a history of severe pruritus within 2 months prior to day 0; 8.History or presence of clinically concerning cardiac arrhythmias, the duration of the study may affect survival; 9.Presence of any other disease or condition that is interfering with the absorption, distribution, metabolism, or excretion of drugs including bile salt metabolism in the intestine; 10.Medical conditions that may cause nonhepatic increases in ALP (e.g., Paget's disease) or which may diminish life expectancy to \< 2 years.