Semiconductor quantum dot (QD) at low temperature will create excitons with sharp spectral lines for single photon emission. Optical fiber coupling avoids scanning for positioning and vibration influence in low-temperature confocal setup, and is a key technology in realizing the plug-play and componentization of QD single photon sources. For the fiber coupling techniques, the lateral coupling of a photonic crystal cavity or waveguide with a tapered fiber, or normal coupling of a QD chip with a tapered facet fiber in a large numerical aperture has been developed based on mask in a micro-region; however, the above techniques require multi-dimensional precise adjusting in order to avoid abnormally bending a soft fiber to realize alignment and high-efficiency coupling. Ceramic ferrule or silica V-shaped groove-mounted fiber has a large smooth facet and no bending; it can collect light in the normal direction by being aligned with bonding QD chip; V-shaped groove-mounted fiber array also enables a random adhesion and avoid scanning for alignment, which is simple in technique. This work is based on the previous realization of single photon output by random adhesion of few-pair DBR micropillar chip with V-shaped groove-mounted fiber array, and uses many-pair DBR cavity chip with theoretical simulation optimization to improve the normal light extraction and its fiber collection efficiency, and greatly improves the fiber output of single photon count rate.