Provided is a multi-channel optical module and a manufacturing method of the same. The optical module includes a base block having a cavity on one edge of the base block; a substrate arranged on the other side of the base block that faces the cavity; an integrated circuit (IC) chip mounted on the substrate; a platform arranged in the cavity; electrical contacts connected to the IC chip, wherein the electrical contacts are formed on the platform; an optical device array block arranged in the platform, wherein the optical device array block is connected to the electrical contacts; a plurality of optical fiber cores aligned with the optical device array block; and an optical fiber array block fixing the plurality of optical fiber cores, wherein the optical fiber array block is bonded to the platform and to the optical device array block and is fixed in the cavity.