Body flame-retardant nylon as well as preparation method and application thereof

The invention discloses bulk flame-retardant nylon as well as a preparation method and application thereof, and belongs to the technical field of flame-retardant material processing. The preparation method of the bulk flame-retardant nylon comprises the following steps: melt polymerization and solid-phase tackifying are carried out on a mixture of a polyamide prepolymer and a flame-retardant monomer, and the intrinsic viscosity of the polyamide prepolymer is 0.1-0.6 dl/g. In the preparation process of the bulk flame-retardant nylon, the polyamide prepolymer is an oligomer which is obtained through a polymerization method in advance and has a large number of reactive groups, the prepolymerization process can be carried out smoothly and the polymerization degree is controllable due to the fact that no flame retardant monomer exists in the prepolymerization process, and then the polyamide prepolymer and the flame retardant monomer are mixed, melted and polymerized to obtain the bulk flame-retardant nylon. Accord