The transverse displacement significantly affects the coupling efficiency of fiber head. This paper introduces a directional tapered fiber connector designed to enhance coupling efficiency. Compared with the traditional connector, the new connector expands the receiving area of the incident light to improves the receiving performance. Next, the total reflection characteristics and power coupling characteristics of tapered fiber are analyzed theoretically. The theoretical analysis results show that the new tapered fiber head can effectively improve the coupling efficiency. To validate the performance of the new connector, a sample was fabricated and subjected to bit error rate experiments under micro-vibration conditions. The experimental results confirm that the tapered connector exhibits a lower bit error rate and superior performance in micro-vibration environments.