The presence of tubular urine is often indicative of substantial renal damage. It is a cylindrical structure formed by coagulation of proteins in the urine in the renal tubules and collecting ducts. proteinuria is necessary for the formation of tubular urine, and the substrate for its formation is T-H glycoprotein. in 1966, Mcqueen used the fluorescent antibody method to further confirm that various proteins with different molecular weights in the plasma can coagulate on the transparent tubular substrate (T-H glycoprotein) in the form of particles. In pathological conditions, due to the increased permeability of the glomerular basement membrane, a large amount of proteins enter the renal tubules from the glomerulus, and in the renal distal tubules and collecting ducts, due to the concentration (water absorption) acidification (increase in acids) and the presence of chondroitin sulfate, the proteins coalesce and precipitate in the lumen of the renal tubules to form the tubular pattern. Therefore, the prevention of tubular urine starts with the prevention of diseases of the kidney. In daily life should pay attention to the following matters: 1, try not to use or use less drugs with strong nephrotoxicity, try to avoid or reduce the contact with various poisons with strong nephrotoxicity. 2, quit smoking and avoid alcohol. 3, women menstruation, pregnancy, puerperium, etc., especially pay attention to personal hygiene, to prevent urinary tract infections. 4, regular body checkups. Promote healthy sex life.