Abstract: The Covid-19 outbreak continues on a large scale around the world, bringing unprecedented impact to people's work and life. In order to reduce the direct contact caused by door-to-door delivery and prevent the spread of the epidemic, on February 6, 2020, the Ministry of Commerce and the National Health Commission jointly issued a contactless delivery prevention policy for the catering industry. On the one hand, food deliveryman need to stably output their labor productivity to relieve their own survival pressure; on the other hand, they also need to strictly abide by the prevention and control policy to avoid the spread of the virus during the delivery process. Based on the data from the Ele.me platform and the epidemic data released by the National Health Commission, the impact of the severity of the Covid-19 on the labor productivity of delivery man (delivery performance, capacity utilization, and delivery quality) of food deliveryman is studied; in addition, whether the contactless delivery policy will mitigate the impact of on the labor productivity of the delivery man, and the dynamics of this impact are examined. After that, the moderating effect of workday and experience of delivery man are explored, and some robustness tests are done to increase the reliability of the results. The result show that: First, the severity of the Covid-19 significantly negatively affect delivery performance and capacity utilization, but not significantly affect the quality of delivery; in addition, it is found that the contactless delivery policy will aggravate the impact of the Covid-19 on delivery performance, and as the epidemic is gradually under control, this negative impact become greater. However, the moderate effect of the contactless delivery policy on the relationship between the severity of the Covid-19 and capacity utilization of delivery man varies in different period. Specifically, when the epidemic is serious, the policy alleviate the negative impact of Covid-19 on capacity utilization, but when the epidemic is gradually under control, the policy aggravate the impact, as epidemic enter a stable period, the moderate effect of the policy is no longer significant. Finally, in hoc-analysis, it is found that the workday aggravates the impact of the Covid-19 on delivery performance, and rich experience of delivery man alleviates the impact of the Covid-19 on capacity utilization. By discussing on-demand delivery issues in the context of Covid-19, the lack of research on on-demand services under major public health emergencies is made up for, and suggestions for on-demand delivery platforms and relevant policy makers on coping strategies are provided.

Key words: Covid-19; gig economy; food delivery platform; delivery productivity; contactless delivery policy