Abstract: A method for designing a high-speed multichannel optical module. Components in an optical module are classified into a circuit part and an optical path part according to functions, and the circuit part and the optical path part are separately processed and then assembled to be an optical module. Thus, modular production is implemented, and multiple parts can be processed at the same time, thereby improving the production efficiency. Moreover, if any fault occurs to either of the parts, the part can be independently replaced and maintained, thereby preventing the entire optical module from being scrapped, facilitating control of the production costs, and improving the yield rate. Also disclosed in the present invention is a high-speed multichannel optical module, which is manufactured according to the design method above. The high-speed multichannel optical module employs a modular structure, and comprises a circuit part and an optical path part which are electrically connected.