The invention provides a conformal circuit and a preparation method therefor. The preparation method for the conformal circuit comprises the following steps of S1, irradiating a substrate by laser to form a circuit structure on the substrate; S2, immersing the substrate in a chemical copper-plating solution to plate the circuit structure with copper, wherein the substrate comprises a laser processing layer, and the circuit structure is formed on the laser processing layer; the step S1 also a step of preparing the laser processing layer; the preparation of the laser processing layer comprises a step S11a or a step S11b, wherein the step S11a is as follows: mixing oxidizing agent and plastic into a solvent to form a mixture; and then evaporating the solvent in the mixture so as to form the laser processing layer; and the step S11b is as follows: uniformly mixing the oxidizing agent, epoxy resin, a hardening agent and acetone to form epoxy resin coating; and then curing the epoxy resin coating so as to form the laser processing layer. The conformal circuit produced by the invention is more flexible in design and higher in production efficiency.