Background. The efficacy of endurance training (ET) on patients with chronic obstructive pulmonary disease (COPD) has been controversial. This study was aimed at meta-analyzing the effect of ET in COPD patients undergoing pulmonary rehabilitation. Methods. The literature retrieval was performed in databases to screen relevant literature. Inclusion criteria were as follows: (1) subjects—COPD patients; (2) inclusion of interventional and control groups; (3) intervention measures—the interventional group received whole-body ET and other lung rehabilitation training, while the control group did not receive intervention or other lung rehabilitation training; (4) outcome indicators which included at least one of the following—6MWD, modified Medical Research Council questionnaire (mMRC), and COPD Assessment Test (CAT); and (5) study type—randomized controlled trials (RCTs). The Cochrane risk-of-bias tool was used to assess the risk of bias. The chi-square test was used to evaluate the magnitude of heterogeneity. Subgroup analysis was used to explore the source of heterogeneity. A funnel plot and Egger’s test were used to evaluate publication bias. Results. The 6MWD in the ET group was significantly higher than that in the control group (
MD
=
47.20
, 95% CI [28.60, 65.79],
P
<
0.00001
). Significant heterogeneity (
P
<
0.00001
,
I
2
=
76
%
) without publication bias (
P
>
0.05
) was noted. Subgroup analysis showed that the 6MWD of the ET group was significantly larger than that of the control group without heterogeneity (
P
=
0.63
,
I
2
=
0
%
;
P
=
0.59
,
I
2
=
0
%
) in both the no training subgroup (
MD
=
79.26
, 95% CI [72.69, 85.82],
P
<
0.00001
) and other rehabilitation training group (
MD
=
23.64
, 95% CI [6.70, 40.57],
P
=
0.006
). The mMRC score (
MD
=
−
0.72
, 95% CI [-1.09, -0.34],
P
=
0.002
) and CAT (
MD
=
−
6.07
, 95% CI [-7.28, -4.87],
P
<
0.00001
) of the ET group were significantly lower than those of the control group. There was no heterogeneity (
P
=
0.32
,
I
2
=
15
%
;
P
=
0.16
,
I
2
=
41
%
). Conclusion. ET can improve patients’ motor function and reduce dyspnea. ET might be incorporated as an important part of lung rehabilitation training.