Objective: To evaluate the feeding effect of not monitoring gastric residual volume in ICU patients receiving continuous enteral feeding,including complications and calorie intake. Methods: We searched for relevant studies in China national knowledge internet(CNKI), Wanfang Data, PubMed, Embase, Cochrane library. We included all Randomized controlled trials (RCTs) and pre-post studies related to the feeding effect of not monitoring gastric residual volume in ICU patients receiving continuous enteral feeding. Two researchers independently screened, appraised and extracted data, and meta-analysis was conducted via RevMan 5.3 software. Results: 3 RCTs and 2 pre-post studies with 1 000 patients were included. Not monitoring gastric residual volume increase the rate of vomiting [OR=1.35, 95%CI(1.02, 1.80), Z=2.08, P=0.04], decrease the proportion of intolerance to enteral nutrition [OR=0.35, 95%CI(0.26, 0.46), Z=7.29, P<0.01], there were no significant differences in diarrhea [OR=1.14, 95%CI(0.78, 1.67), Z=0.67, P=0.51] and distention[OR=1.24, 95%CI(0.76, 2.03), Z=0.87, P=0.38]. The cumulative calorie deficit between targeted volume and provided volume in not monitoring gastric residual volume group was significantly lower than the control group[MD=-0.29, 95%CI(-0.47, -0.11), Z=3.23, P=0.001], daily provided calorie amount was also significantly higher than the control group [MD=0.35, 95%CI(0.10, 0.59), Z=2.75, P=0.006]. Conclusions Not monitoring gastric residual volume in ICU patients increase calorie intake and have better enteral nutrition provision, decrease the proportion of intolerance to enteral nutrition. Monitoring gastric residual volume should not be taken as a routine task in critical care nursing.