The recovery time after renal tubular injury is related to the cause of the disease. Renal tubular epithelial cell detachment can be repaired within 1-2 weeks, while renal tubular injury caused by poisoning and immune factors is difficult to be repaired. The renal tubule is an important tissue structure for the body to excrete toxins and regulate the water and electrolyte balance, ischemia, infection, poisoning and toxic side effects of drugs can lead to renal tubular damage. After renal tubular damage, the toxins metabolized by the body accumulate in the body, metabolic acidosis will occur, as well as water and electrolyte balance disorders. Renal tubular injury requires active treatment to address the cause. In case of tubular injury caused by insufficient blood volume, the renal tubules can be gradually repaired 1-2 weeks after renal perfusion is restored. However, it is difficult to repair the renal tubules caused by immune factors and drug intoxication. After renal function is impaired, patients should go to nephrology department in time to find and relieve the cause of the disease as early as possible, in order to save more pairs of renal units and protect renal function.