The present disclosure provides a liquid eyeliner and a manufacturing method thereof. The liquid eyeliner includes following components by weight: acrylic acid octyl acrylamide copolymer or propylene ester octyl acrylamide copolymer ranging from 4-9%, propylene glycol provided ranging from 5-7%, ethylhexylglycerin ranging from 0.1-0.6%, butanediol ranging from 1.5-4%, sorbitan oleate ranging from 1-2%, emulsifier ranging from 1.4-2.2%, polydimethylsiloxane ranging from 6-9%, polyvinylpyrrolidone ranging from 3-4%, sorbitan sesquioleate ranging from 1.2-2%, butylated hydroxytoluene ranging from 0.1-0.2%, methylparaben ranging from 0.1-0.3%, propylparaben ranging from 0.05-0.15%, phenoxyethanol ranging from 0.6-1.2%, essence ranging from 0.1-0.3%, carbon black ranging from 1.5-2.8%, iron oxide black ranging from 30-45%, deionized water ranging from 22-30%, and plant extract ranging from 0.1-0.3%.