Abstract: The influence of types and content of flame-retardants and glass fibers on the mechanical properties, glow-wire ignition temperature, comparative tracking index was investigated. It was shown that the comprehensive performance of composite containing a home-made halogen-free flame-retardant (OP1120A) was the best. Though the mechanical properties and the comparative tracking index decreased, the flame retardant properties increased with increasing OP1120A content. When the content of long-glass-fiber-reinforced was 40 % and the content of OP1120A was 17 %, the tensile strength, impact strength, comparative tracking index, and glow-wire ignition temperature of the composite were 189 MPa, 213 J/m, 650 V and 960 ℃ respectively.