Thread trimming mechanism of garment sewing machine

The utility model discloses a trimming mechanism of a garment sewing machine, and relates to the technical field of sewing machines. The device comprises a rack, two sliding plates which synchronously and reversely slide are arranged on the rack, mounting seats are arranged on the sliding plates, a blade and a tool apron are arranged on the two mounting seats respectively, a fixing plate which abuts against and is in lap joint with a sewing thread is arranged on the sliding plates in a sliding mode, and an extrusion spring is arranged between the fixing plate and the sliding plates. When the device is used, the two sliding plates are driven to synchronously and reversely slide, a sewing thread is cut off through cooperation of the blade and the tool apron, the sewing thread is fixed through pressing force of the fixing plate and elastic potential energy of the extrusion spring, the springback phenomenon is avoided, subsequent sewing is prevented from being affected, and therefore the device is more practical.