▎ 摘　　要

NOVELTY - A flame-retardant yarn comprises 60-70 mass% graphene composite fiber, 10-20 mass% acrylic fiber pre-oxygen fiber and 10-20 mass% PTFE fiber. USE - Flame-retardant yarn. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for preparing a flame-retardant yarn, which involves mixing the graphene composite fiber, acrylic oxidized fiber and polyfluortetraethylene fiber, and spinning to obtain the finished product.