The invention relates to a wiring method for electrical products, which adopts a wiring plate-type pre-wiring process. The method comprises the steps of: manufacturing a set of standard product wiring harness; manufacturing a wiring harness forming chart according to the standard product wiring harness; selecting a wiring harness fixing fixture according to the characteristics of the products; manufacturing a pre-wiring plate according to the wiring harness forming chart; performing product wiring on the pre-wiring plate; assembling the product wiring harness pre-wired on the pre-wiring plateinto the products integrally. The wiring plate-type pre-wiring process comprises the steps of: manufacturing the pre-wiring plate, wherein the manufacturing of the pre-wiring plate comprises the steps of inputting the chart of 1:1 and selecting the wiring harness fixing fixture; and after the pre-wiring plate is manufactured, verifying the rationality of the pre-wiring plate and whether the wiring harness is standard and the operation is convenient, wherein the verification of the pre-wiring plate comprises the step of: verifying the forming and proportion of the wiring harness by assembling the wiring harness pre-wired on the pre-wiring plate into the products; and after the pre-wiring plate passes the verification, completing the whole pre-wiring process.