A bidirectional optical transmitting and receiving secondary module includes the light-emitting component, at least one photic component and the loading piece which has at least two grooves. At least one of the grooves is combined with the filter. The light signal outputted from the light-emitting component is refracted by the filter and reflected by the groove without combining the filter to the optical conduction component. The invention can reach the precise optics contraposition and improves the reliability of the optics component but decreases the cost, also it can improve the light coupling efficient by combining the double lens structure. |