A bobbin thread introduction device to be applied to a sewing machine, capable of mounting bobbin thread to a bobbin and a bobbin case, and comprising: a first motion module, comprising a first transmission member and a first driving source capable of driving the first transmission member to rotate, wherein the bobbin is driven to synchronously rotate by the first transmission member, which makes the bobbin thread wound around the bobbin; and a bobbin thread clamping mechanism; characterized in that the bobbin thread clamping mechanism comprises: a clamp module, that can be located at a clamping position where it is made to clamp the bobbin thread that is located between the bobbin and a thread gripper; a first moving module, capable of driving the clamp module to move from the clamping position to a first preparatory position, which makes the bobbin thread located between the clamp module and the thread gripper pass under the bobbin, along a first path a second moving module, capable of driving the clamp module to move from the first preparatory position to a first guiding position where the bobbin thread located between the clamp module and the thread gripper is to be cut, along a second path intersecting the first path; wherein the first moving module is coupled to the second moving module, and when the second moving module drives the clamp module to move along the second path, the first moving module simultaneously moves; and in that the bobbin thread introduction device further comprises: a second motion module, comprising a second transmission member and a second driving source capable of driving the second transmission member to rotate, wherein the bobbin case is driven to synchronously rotate by the second transmission member, so that the rotating bobbin case can introduce the bobbin thread into a thread guiding slot formed on the bobbin case. a first motion module, comprising a first transmission member and a first driving source capable of driving the first transmission member to rotate, wherein the bobbin is driven to synchronously rotate by the first transmission member, which makes the bobbin thread wound around the bobbin; and a bobbin thread clamping mechanism; characterized in that the bobbin thread clamping mechanism comprises: a clamp module, that can be located at a clamping position where it is made to clamp the bobbin thread that is located between the bobbin and a thread gripper; a first moving module, capable of driving the clamp module to move from the clamping position to a first preparatory position, which makes the bobbin thread located between the clamp module and the thread gripper pass under the bobbin, along a first path a second moving module, capable of driving the clamp module to move from the first preparatory position to a first guiding position where the bobbin thread located between the clamp module and the thread gripper is to be cut, along a second path intersecting the first path; wherein the first moving module is coupled to the second moving module, and when the second moving module drives the clamp module to move along the second path, the first moving module simultaneously moves; and in that the bobbin thread introduction device further comprises: a second motion module, comprising a second transmission member and a second driving source capable of driving the second transmission member to rotate, wherein the bobbin case is driven to synchronously rotate by the second transmission member, so that the rotating bobbin case can introduce the bobbin thread into a thread guiding slot formed on the bobbin case.