Ampicillin sodium sulbactam sodium preparation for injection and preparation method thereof

The invention discloses an ampicillin sodium sulbactam sodium preparation for injection and a preparation method thereof. The ampicillin sodium sulbactam sodium preparation for injection is formed by mixing high-purity ampicillin sodium crystals with high-purity sulbactam sodium uniformly, wherein the weight ratio of ampicillin sodium to sulbactam sodium is (2-4):1. The ampicillin sodium sulbactam sodium preparation for injection has the advantages of high purity, less impurity, high stability, difficult irritability and the like.