The use of natural polymers, such as biomass, as an alternative to non-renewable polymer attracts a growing interest in sustainable agricultural production. Seed coating, an important treatment for enhancing crop performance, could be an environmentally-friendly and promising option when utilizing materials based on natural polymers. Herein, biomass-based seed coating agents derived from cellulose and lignin through a simple process were developed. Carboxymethyl cellulose was used as the primary substrate for membrane formation, supplemented with sodium lignosulfonate as an additive to enhance its mechanic and anti-UV properties. The prepared seed coating agents showed promising film-forming property, flexibility, and water retention capacity. Furthermore, these agents were effective in controlled release and anti-UV performances for pesticides encapsulated in it. Additionally, the thickness of the seed coat could be finely tuned by controlling the soaking time, and therefore resulting in an adjustable germination time. More importantly, the agents demonstrated natural degradability with nearly 80 % degradation at 60 days. It is concluded that the seed coating agents prepared provides new insight into the use of biomass-based materials in sustainable agricultural systems.