Objective Aiming at the large energy consumption of traditional condensing dehumidification systems this study proposed a method to improve the dehumidification efficiency using a wraparound loop heat pipe dehumidification system and investigated the influence of inlet air state parameters on the performance of this dehumidification system. Methods Firstly the experimental test bench of the wraparound loop heat pipe dehumidification system was constructed in a constant temperature and humidity laboratory. Secondly through the pre-cooling experiment of the wraparound loop heat pipe dehumidification system the energy-saving effect during the dehumidification process was analyzed. Finally the influence of state parameters such as inlet air velocity dry bulb temperature and relative humidity on the dehumidification performance of the wraparound loop heat pipe dehumidification system was analyzed. Results The experimental results showed that the wraparound loop heat pipe dehumidification system can pre-cool the inlet air and with the increase of inlet air temperature the pre-cooling temperature and energy-saving amount gradually increase indicating that the pre-cooling effect reduces the total energy consumption of the system during the dehumidification process. Additionally the dehumidification capacity per unit input power of the system showed a trend of first increasing and then decreasing with the increase of inlet air velocity while it increases with the increase of inlet air dry bulb temperature and relative humidity. Conclusion The wraparound loop heat pipe dehumidification system can achieve good energy-saving effects through pre-cooling during the dehumidification process. Under the condition of unchanged other parameters the increase of inlet air dry bulb temperature or relative humidity will enhance the dehumidification efficiency of the system. Meanwhile to ensure a higher dehumidification efficiency of the dehumidification system it is necessary to control the inlet air velocity within the range of 1. 5 m / s ~2. 0 m / s.