A cervical canal length of only 6 millimeters at 26 weeks of pregnancy is usually abnormal and suggests an increased risk of preterm labor, which can be treated with cervical cerclage, medications, and cervical supports. Normally, a cervical canal length of less than 25 millimeters at 24 weeks of pregnancy indicates an increased risk of preterm labor, and a cervical canal length of only 6 millimeters at 26 weeks of pregnancy indicates a very high risk of preterm labor. At this time, the pregnant woman can perform emergency cervical cerclage under ultrasound, or vaginal medication such as the use of micronized progesterone vaginal pessary, or the use of cervical support to prevent the occurrence of preterm labor. If a pregnant woman has a cervical canal length of only 6 millimeters at 26 weeks of pregnancy, it is recommended that she seek medical attention in time, under the guidance of the doctor, improve the relevant examinations, clarify the cause of the disease and treat the symptoms. Pregnant women during pregnancy should pay attention to do a good job of prenatal checkups, actively listen to the advice of professional doctors to do a good job of comprehensive care and health care, pay attention to rest, at the same time, should relax, to avoid nervousness, anxiety, there is any discomfort should be timely to the hospital.