The present invention relates to a non-aqueous electrolyte solution for a lithium secondary battery and a lithium secondary battery including the same, and particularly, to a non-aqueous electrolyte solution for a lithium secondary battery which includes an ionizable lithium salt, an organic solvent, and an additive, wherein the additive includes tetravinylsilane, lithium difluorophosphate, and 1,3-propylene sulfate in a weight ratio of 1:3 to 20:3 to 20, and a total amount of the additive is in a range of 1 wt % to 4 wt % based on a total weight of the non-aqueous electrolyte solution for a lithium secondary battery, and a lithium secondary battery including the same.