Urethral injuries must be treated as soon as possible in a hospital by a specialist. Urethral injury during straddle riding is characterized by swelling and pain in the perineum, pain aggravated by urination, posterior urethral rupture with pelvic fracture, pain aggravated by movement, accompanied by hematuria, difficulty in urination and urinary retention, and in severe cases, shock of varying degrees can be seen. Urethral injury should be considered in patients with a history of straddle trauma or pelvic crush injuries that present with urethral bleeding and difficulty urinating. First aid methods: To prevent shock, fluids, blood transfusion, sedation and analgesia should be given in time, and effective antibiotics should be applied to prevent infection. For mild urethral injury urination is not difficult, only need to drink more water to maintain urine volume. Apply hemostatic and antibacterial drugs and observe the degree of urinary patency to decide whether to perform urethral dilatation.