The present 24-week, prospective, open-label, randomized, multicenter, parallel group trial is carried to investigate and evaluate the efficacy and safety of Liraglutide in combination with prandial insulin therapy vs insulin glargine in combination with prandial insulin therapy in overweight / obese patients with uncontrolled type 2 diabetes.

An increasing number of patients with type 2 diabetes are treated with insulin. Patients with diabetes receiving intensive insulin therapy with various combinations of basal and prandial insulin can be caught in a vicious but common cycle, whereby insulin requirements increase over time, and this in turn contributes to weight gain and hypoglycemia and further increases in insulin dosing. At this stage, clinicians observe a practical limit to the efficacy of insulin titration alone on glucose-lowering and often add or continue metformin to reduce insulin resistance. Injectable glucagon-like peptide-1 receptor agonists (GLP-1 RAs), such as liraglutide, are a relatively new addition to our treatment armamentarium. These drugs improve glucose control and insulin sensitivity and contribute to weight loss. Treatment with basal insulin plus GLP-1RAs is well-established in diabetes guidelines and may be as effective as adding prandial insulin therapy. When GLP-1 RAs are started, a preemptive reduction in insulin dosage by 25% to 30% in patients with HbA1c < 9% may reduce the risk for hypoglycemia. In overweight/obese patients with uncontrolled type 2 diabetes treated with more than three oral antidiabetic drugs (OADs) or high doses of premix insulin, Is basal-prandial insulin therapy the option treatment algorithm? Such an intensification strategy carries risk of increased hypoglycaemia and weight gain, both of which are associated with worse long-term outcomes. There have no randomized, controlled trials to evaluate the efficacy and safety of GLP-1 RAs vs insulin glargine added to prandial insulin in overweight/obese patients with uncontrolled type 2 diabetes. So, the current 24-week, prospective, open-label, randomized, multicenter, parallel group trial will be preformed to assess whether Liraglutide plus prandial insulin therapy was superior to glargine plus prandial insulin therapy in overweight/obese patients with uncontrolled type 2 diabetes.

Inclusion Criteria:

• Age: 18 - 75 years old.
• BMI must be greater than 24 and less than 45 kg/m2
• Patients with type 2 diabetes who met the World Health Organization (who) diagnostic criteria (1999).
• Newly diagnosed type 2 diabetic patients with HbA1c ≥ 9.0%；or patients with uncontrolled type 2 diabetes (HbA1c ≥ 7.5% ) who have received at least two types of oral hypoglycemic drugs (the dose of each drug needs to reach the second largest dose or more), or only insulin (excluding basal-bolus insulin therapy), or insulin with oral hypoglycemic drugs.
• Signed informed consent.

Exclusion Criteria:

• History of pancreatic disease,
• History of medullary thyroid carcinoma
• Lipase level > 3 times above normal,
• Creatinine clearance ≤ 30 mL/min/1.73m2,
• Evidence in the last 6 months of significant heart disease or stroke, including myocardial infarction, unstable angina, coronary bypass and/or percutaneous transluminal coronary angioplasty, congestive heart failure (New York Heart Association Functional Classification III-IV), or severe ischemic heart disease.
• Preparation for pregnancy or having been in pregnancy
• Researchers believe that there are any factors that affect assessing subjects' participation in trial.
• Patients unable to cooperate in clinical trials