Objective To evaluate the clinical application of non-invasive cardiac output monitoring (NICOM) for early fluid resuscitation in children with septic shock. Methods 61 children diagnosed with septic shock in the PICU at our hospital between January 2019 and June 2020 were randomly divided into a control group (29 without NICOM monitoring) and an intervention group (32 with NICOM monitoring), and the results of blood gas analysis (pH,lactate and residual base), urine volume, and mortality, and NICOM monitoring (CO, CI, SVR, SVRI, HR, and MAP) were recorded at 6, 12, and 24 h after fluid resuscitation. Results There was no statistically significant difference in HR, MAP, lactic acid, residual base and urine volume between the two groups after 6 h of fluid resuscitation (P>0.05), and lactic acid was lower in the intervention group than that in the control group after 12 h of fluid resuscitation (P<0.05); the differences in HR, MAP, lactic acid, residual base and urine volume between the two groups after 24 h of fluid resuscitation were all statistically significant (P<0.05). The differences were statistically significant (P<0.05) in CO, CI, SVR, SVI, HR, and MAP at 12 h and at 24 h after treatment in the intervention group compared with that of the pre-treatment (P<0.05). Conclusion NICOM has high sensitivity and accuracy and it can be operated in simple processes. It may be effectively applied to guide the early fluid resuscitation of septic shock. It also provides Objective evidence for individualized treatment and correctly guides volume management. Its scientific and practical value makes it worth promoting.