The invention relates to a tie-back device comprising an insert, a blind plate and a packer. The insert can be inserted into a tie-back cylinder of a tail pipe. The blind plate is arranged at the upstream position of the insert, so that the situation that an object penetrates through the upstream position of the insert and enters the insert is prevented. The circumferential side wall of the insert is sleeved with the packer. The packer can be sealed in a setting mode to enable an annulus to be separated at the packer. By using the tie-back device, the situation that cement paste penetrates through the blind plate from the upstream to enter the downstream insert can be prevented through the blind plate, and thus a tool which is placed downwards later is prevented from being abraded at the insert.