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 (P2) 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 (P2) to a first preparatory position (P1), which makes the bobbin thread located between the clamp module and the thread gripper pass under the bobbin , along a first path (D1) a second moving module , capable of driving the clamp module to move from the first preparatory position (P1) to a first guiding position (P3) where the bobbin thread located between the clamp module and the thread gripper is to be cut, along a second path (D2) intersecting the first path (D1); 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 (D2), 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 (P2) 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 (P2) to a first preparatory position (P1), which makes the bobbin thread located between the clamp module and the thread gripper pass under the bobbin , along a first path (D1) a second moving module , capable of driving the clamp module to move from the first preparatory position (P1) to a first guiding position (P3) where the bobbin thread located between the clamp module and the thread gripper is to be cut, along a second path (D2) intersecting the first path (D1); 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 (D2), 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 . <EOS>