The invention relates to production technology of an automobile sealing strip. Compared with an automobile sealing strip in the prior art, the produced automobile sealing strip is excellent in elasticity, compressive deformation resistance, and aging, ozone and chemical effect resistance, has a wide application temperature range, ensures continuity between parts of an automobile body, prevents air-flow separation generated at bonding sites, can easily release a periodic wake flow, can reduce the wind noise due to high speed driving, and improve the air tightness and dust prevention of an original automobile. The sealing strip is simple in process and reasonable in formula, the adopted raw materials are eco-friendly and non-toxic, and the adopted fire retardant is good in thermal stability and lasting in flame resistance, and is non-toxic and can inhibit smoke. The automobile rubber sealing strip is excellent in flame retardance, aging resistance, environment resistance, and weather resistance, has no effect on human's health and the environment, and has bright market prospects.