The invention relates to a method for using single component low-temperature zinc-based phosphatization liquid, comprising the steps of removing oil, rinsing,, removing rust, rinsing, tempering, parkerising, rinsing, drying and coating, wherein the tempering technology is as follows: firstly, using a frosting material to frost the surface, then using a fan to blow the frosted fragments on the surface away, using magnet to further absorb the fragments on the surface, and finally, using an air-heater or a thermal radiation device to heat the surface to at least 35 DEG C is ordinarily reached to prepare for phosphatization treatment. The method has the beneficial effects that the phosphatization speed is fast: phosphatization is carried out for 2-5 minutes to obtain high quality phosphatization film with the depth of 1-3 microns / cm<2> under the tempering process condition of 25-40 DEG C; the single component is supplied, the same liquid is adopted during tanking and replenishing, and the regulation is extremely convenient; the bonding force between the phosphatization film and a paint film is firm, and a coating layer has good corrosion resistance; and the phosphatization liquid does not contain toxic substances such as heavy metals, nitrites and the like, is in favor of worker health and environment protection, has the characteristic of less sediment amount, and can be used for a long term.