Abstract: Objective: To explore the clinical value of urine flow and bladder temperature detection in patients with craniocerebral trauma, and to provide reference for the scientific monitoring of body temperature in patients with craniocerebral trauma. Methods: A total of 80 patients with craniocerebral trauma treated with neurosurgery ICU from January 20 to January 2017 were divided into study group and control group according to the treatment regimen. Forty patients were treated with compound mannitol , The control group given the general rehydration, compared the two groups of patients with intracranial pressure and mean arterial pressure changes, according to the experimental design were detected in both groups of urine flow, bladder temperature, rectal temperature, and analysis of different urine flow and bladder temperature, rectal temperature Relevance and consistency. Results: The decrease of intracranial pressure (17.24±3.15)mmHg in the study group was significantly higher than that in the control group (5.14±1.64), the difference was statistically significant (P＜0.05). The mean arterial pressure reduction (31.43±5.36)mmHg in the study group was significantly higher than that in the control group (2.45±0.81)mmHg, the difference was statistically significant (P＜0.05).The urine flow in the study group was (52.26±10.14)ml, which was significantly higher than that in the control group (23.15±6.26)ml,the difference was statistically significant (P＜0.05).There was no significant difference in rectal temperature between the two groups (P＞0.05). The difference between the two groups was statistically significant (P＜0.05). Pearson analysis showed that the urinary bladder (P＜0.05). Bland-Altman analysis showed that bladder temperature was consistent with rectal temperature and was not affected by urinary flow. Conclusion: The temperature of the bladder is measured by the temperature measurement catheter, which is not affected by the urine flow. It can reflect the body temperature and the condition of the traumatic brain injury. It has a high clinical value and worthy of clinical promotion