Objective: This study aims to evaluate the efficacy and safety of nesiritide after total cavo-pulmonary connection surgery in children. Investigators hypothesized that compared with placebo, patients assigned to receive nesiritide will improve early postoperative outcomes. Study design: The study is a a single-center, randomized, single-blinded, placebo-controlled, two-arm parallel-group clinical trial, patients undergoing total cavo-pulmonary connection surgery are assigned to receive nesiritide or placebo. A standard dose of study drug was administered by a continuous infusion for ≥24 hours and ≤7 days after cardiac intensive care unit admission. The primary outcome is days of chest drainage. Secondary outcomes included days of hospitalization measures of cardiovascular function, renal function, and adverse events and neurohumoral. The eligible participants will be allocated into intervention and control groups in a 1:1 ratio randomly. The intervention group will receive study drug. All the participants will be followed up during hospitalization .