Abstract: Infrared detectors are crucial for the precision of satellite attitude measurements by infrared earth sensors. Ensuring their stable and reliable operation requires high sealing performance. This study compared parameters and examined the volatility of various space adhesives, selecting 8361M-UV adhesive based on its UV light curing principle and characteristics for sealing process testing. The experiments included selecting adhesive curing parameters, determining the shell sealing process, and verifing space environmental adaptability. The results indicate that the selected adhesive and sealing process achieve a leakage rate of no more than 5.0×10^-5 Pa·L/s. Following space environmental tests, including mechanical, thermal cycling, and vacuum tests, all fifty samples maintained a leakage rate below the 5.0×10^-5 Pa·L/s threshold, meeting the sealing requirements for this type of infrared detector. Rigorous subsequent testing showed that 96% of samples still met the leakage rate standard, demonstrating the safety margin and reliability design of the adhesive and its sealing process.