In this study， a technique for the synthesis of multi-core optical fiber connectors used in optical network systems is developed. In addition， systems that can measure the insertion and return losses of multi-core optical fiber movable connectors are constructed using an optical continuous wave reflectometer and optical low-coherence reflectometer， respectively， to evaluate the connection effect. Three quality control requirements-accurate core alignment， physical contact， and non-relative rotation-that must be satisfied during the preparation and docking of multi-core optical fiber connectors are proposed after a detailed analysis of the effects of external factors and end-face quality on the insertion and return losses of multi-core optical fiber connectors. A multi-core optical fiber connection with a typical LC-type interface is prepared. A three-dimensional （3D） profiler is used to record the 3D characteristics （vertex offset， curvature radius， optical fiber concavity， and convexity） of the multi-core optical fiber connector， as well as the roughness of its end face. Using the constructed measurement systems， an average low insertion loss of 0.089 dB and average high return loss of 52.31 dB are achieved for all fiber core channels in the prepared four-core fiber connector. Thus， the proposed synthesis method and performance evaluation scheme may facilitate the practical applications of multi-core fiber-optic movable connectors.