The present disclosure provides a new cytidine derivative having the general formula (I), and applications thereof: R1 As demonstrated by experiments on the growth inhibition effect of the new cytidine derivative of the present invention on HCT-116 colon cancer xenografts in tumor-bearing nude mice , the compound of the present invention has high anti-tumor activity, data of impacts on weight of nude mice bearing human colon cancer HCT-116 and data of mortality rate showed that the toxicity of the compound is comparatively low.