Objective To investigate and analyze the cognition of intraspinal labor analgesia (ILA) of women in labor and its influencing factors. Methods A total of 322 women in labor in West China Second University Hospital of Sichuan University between May and September 2015 were investigated by questionnaire, which included the general situation, the pregnancy status, the understanding for labor pain, and the cognition of ILA. Investigator introduced the knowledge of ILA to them after the investigation, and then they were re-investigated for the choice of ILA. Results Only 22.67% of these women in labor knowed ILA clearly, 53.42% heared it but did not understand, and 49.38% liked to use it. The proportion of women in labor who liked to use it increased to 81.89% after introduction, and the difference was significant (P<0.001). Among all factors, the acknowledgement level of ILA and the choice to use it were mainly related to the family awareness concept for labor pain. Conclusions The cognition of ILA of women in labor is not enough, and their using desire is not strong. The family awareness concept is one of the important factors. The education and advertise to the women in labor and their family members after admiting to labor room can increase the choice rate of ILA significantly.