The present invention provides a packaging device of single optical multiplexed parallel optical receiver coupling system component, comprising a housing having a transmission function, an adapter component and collimating lens. The upper surface of the housing is provided with a first groove and a second groove, the lower surface of the housing is provided with a third groove. One end of the housing is provided with a through hole which communicates with the first groove. One end of the collimating lens is connected with the adapter component, and the other end of the collimating lens passes through the through hole to the first groove. A first slope and a second slope are respectively provided on the adjacent side wall between the first groove and the second groove. The second slope is provided with a reflective film. The third groove is provided with a lens array having multiple channels. The packaging device by mechanical structure alignment and active coupling method so as to greatly reduce the number of optical elements required to be accurately positioned on the optical path in the parallel transceiver optical module, greatly simplify the optical alignment process, more easily realize mass production of the optical packaging of corresponding products, which reduces the cost of the optical packaging of corresponding products.