Biocementation technology is an emerging eco-friendly cementation technology that utilizes the metabolic activity of microorganisms to cement geomaterials. The particle-scale studies on the strength of biocemented bonds remain rare, although extensive research have been conducted on the mechanical properties of biocemented bonds at the element or field scale. Traditional geotechnical testing equipment is insufficient for accurately measuring the strength of biocemented bonds at the particle scale. To precisely measure the mechanical properties of biocemented bonds at the particle scale, a particle-scale tensile testing system for biocemented bonds was developed and the tensile strength tests for particle-scale biocemented bonds was carried out with this system. This testing system was comprised of a displacement control module, a tension measurement module, a specimen fixing module, and an imaging observation and recording module. The displacement control module ensures the stable operation of the loading stage, while the tension measurement module accurately measures and records the evolution of tensile force. The specimen fixing module securely holds specimens to prevent slippage or misalignment. The imaging observation and recording module captures and records the failure behavior of the specimen during the tensile process in real time. Detailed descriptions of specimen preparation, the testing process, and tensile test results were provided. The test results demonstrate that the testing system exhibits high precision and excellent stability. It effectively measures the tensile strength and clearly captures the failure characteristics of biocemented bonds upon tensile loading, providing reliable experimental system for the study of the mechanical properties of biocemented geomaterials.