Abstract: Conventional non-armored flame retardant Class A cables have problems of complicated structure, high production cost and low cable performance pass rate. A new type of non-armored flame-retardant class A cable was developed by improving its structure, and manufacturing process was introduced in detail. 7 ZA-YJV-0.6 / 1 kV-4×50+1×25 mm² were designed and verified, and carbonization height of the 6 samples without oxygen barrier material was in the range of 2.8 m and 3.2 m, and that of the 1 sample with oxygen barrier material was less than 0.7 m. Results of electrical properties, mechanical and physical properties, vertical combustion test of single cable and bundle combustion test (Class A) showed that the new type of non-armored flame-retardant Class A cables could meet the technical requirements of design.