The invention provides an automotive stretch-resistant setting-type flat carpet. The automotive stretch-resistant setting-type flat carpet comprises a PET carpet fabric layer composed of, by weight, 90% of common PET fibers and 10% of low-melting-point PET fibers, an anticorrosion layer is arranged on the front surface of the PET carpet fabric layer, an expanding buffer layer is arranged on the back surface of the PET carpet fabric layer, a slip-resistant layer is arranged on the back surface of the expanding buffer layer and provided with slip-resistant stripes, an antistatic layer is arranged on the front surface of the anticorrosion layer, and a waterproof breathable layer is arranged on the front surface of the antistatic layer. The invention further provides a manufacturing method of the automotive stretch-resistant setting-type flat carpet. The automotive stretch-resistant setting-type flat carpet has the advantages of a certain hardness and stretchability, light weight, low smell, high impact resistance, good anticorrosion and slip-resistant effects, enhanced waterproof breathability and antistatic performance, simple manufacturing technology and high performance cost.