Panax notoginseng
saponins (
PNS
) are a commonly used traditional medicine to treat diabetes in China. Recent studies have confirmed their anti‐diabetic effects, but the underlying mechanisms have remained unclear. The present study was designed to explore whether
PNS
decrease hyperglycemia by improving insulin sensitivity in skeletal muscle and to elucidate the molecular mechanisms. The anti‐diabetic effects of
PNS
were analyzed in a skeletal myoblast cell line, C2C12, and in high fat diet‐induced diabetic
KKA
y mice. C2C12 cells were treated with
PNS
(50, 100, and 200 μg·L
−1
) and examined for glucose uptake, cell viability and expression of components of the phosphoinositide 3‐kinase (
PI
3K)–protein kinase B (
AKT
) signaling pathway.
KKA
y mice were intraperitoneally injected with
PNS
(200 mg·kg
−1
) for 6 weeks. Body weight, blood glucose, serum insulin, serum lipid, glucose and insulin tolerance were measured to evaluate the anti‐diabetic effects of
PNS
. Pathological changes, apoptosis and the
PI
3K–
AKT
signaling pathway were analyzed in
KKA
y skeletal muscle.
PNS
significantly increased insulin‐induced glucose uptake, but did not affect the cell viability of C2C12 cells. In addition,
PNS
reduced blood glucose and serum insulin levels and improved glucose tolerance and insulin tolerance of
KKA
y mice. Pathological changes and apoptosis of skeletal muscle were relieved by
PNS
treatment. Moreover,
PNS
treatment enhanced expression of
mRNA
encoding
IRS
1 and
GLUT
4, as well as the protein expression of phosphorylated (p) ‐insulin receptor substrate 1 (
IRS
1), p‐
PI
3K, p‐
AKT
and glucose transporter type 4 (
GLUT
4) in C2C12 and
KKA
y mouse muscle. Collectively, these data indicate that
PNS
reduces hyperglycemia and insulin resistance through up‐regulating
GLUT
4 expression and the
IRS
1–
PI
3K–
AKT
signaling pathway. Furthermore,
PNS
alleviated diabetes skeletal muscle pathological damage. Thus, our data suggest that
PNS
may be promising anti‐diabetic compounds.