The invention provides a lightweight rodent-resistant optical cable comprising a cable core, an internal sheath, an armored reinforcing layer and an external sheath which are arranged from inside to outside in turn. The armored reinforcing layer comprises multiple reinforcing members which are arranged in a spaced way. The reinforcing members are evenly distributed at the internal circumference of the internal sheath with the cable core acting as the center. The internal sheath and the external sheath are an HDPF sheath. The reinforcing members of the armored reinforcing layer are evenly arranged in the spaced way so that the number of the used armored reinforcing members is obviously reduced in comparison with the situation of close arrangement, the weight of the optical cable is greatly reduced and the production technology is relatively simple. Besides, the specification size of the commonly used reinforcing members on the market at present is greater than 0.8mm, the reinforcing members of smaller diameter can be used as the reinforcing members of the optical cable, and the use amount of sheath material is also greatly reduced so that the weight of the cable can be effectively reduced and the cable is more economical.