The utility model relates to an exhaust system thermal insulation shield applied to a pressurizer engine. The exhaust system thermal insulation shield applied to the pressurizer engine comprises a thermal insulation shield body. The whole thermal insulation shield body is of a there-layer structure. The inner and outer layers are respectively an aluminizing steel plate outer layer and an aluminizing steel plate inner layer. An interlayer is arranged between the aluminizing steel plate outer layer and the aluminizing steel plate inner layer. The interlayer is a ceramic fiber paper layer. The exhaust system thermal insulation shield applied to the pressurizer engine is simple in structure, and reasonable in design. Heat emitted by an exhaust pipe can be fine insulated, and thus damage to other devices is avoided. Noise, vibration and harshness (NVH) properties of a whole car is not affected. Performance of thermal insulation shield is improved, and quality is enhanced.