We report the synthesis of a bio-based, robust and recyclable thermoset polyester elastomer by using an inverse vulcanised sulfur-polymer (SP) as a crosslinker for a bio-based polyester elastomer (BPE). The cross-linkages inherited from SP are mainly composed of dynamic di- and poly-sulfide bonds, which endow the crosslinked BPE with superior mechanical properties and the ability to be malleable and recyclable.