The work aims to investigate the effect of foam box combined with film packaging on the freshness of pakchoi in normal temperature logistics, and analyze the effect of foam box barrier on the choice of thickness for pakchoi preservation film. To investigate the effect of different packaging on the freshness of pakchoi, polyethylene (PE) bags with different thickness of 20 μm, 40 μm, 60 μm, 80 μm and 100 μm were used to pack pakchoi with and without foam boxes. Since the gas barrier of the foam box affected the oxygen content inside the packaging, the thickness of the inner packaging film was different under the condition with and without the foam box. In case of no foam box, 60 μm PE film was selected. In case of foam box, 40 μm PE film was selected, which could effectively control the proportion of headspace to achieve the optimal sensory quality of the pakchoi. In addition, the presence of the foam box allowed the pakchoi to enter a stable gas environment 4 days earlier, which was more conducive to maintaining good merchantability. Regardless of whether there was a foam box or not, the 80 μm and 100 μm PE films were highly susceptible to rapid decay due to anaerobic respiration until merchantability was completely lost. Therefore, the use of foam boxes combined with PE bags directly in the logistics preservation process can effectively maintain the sensory characteristics of pakchoi in normal temperature logistics, which is also low-cost and safe for environment. It is important to note that if foam boxes are adopted, the inner packaging needs to be adjusted accordingly, in order to build the most suitable gas environment for pakchoi to achieve the best express preservation effect.