sensing element with good electromechanical properties and an elastic polymer matrix. [2] The selection of the sensitive material is critical to the sensing performance. The common active conductive materials include metal nanowires (e.g., gold and silver), [3] conductive polymers (e.g., polyaniline and polypyrrole) [4] and carbon nanomaterials (e.g., graphene, carbon nanotubes, and carbon black). [5] Among them, carbon nanomaterials feature with high diversity and adjustable structure and resistance, which are the most promising candidate materials. However, their preparation processes are time-consuming, complex and costly, and may produce environmentally harmful byproducts. Besides, the intractable dispersion problem of carbon nanomaterials also restricts large-scale production. Hence, sustainable and cost-effective approaches for constructing carbon conductive networks are highly desired. Biomass materials are renewable and abundant, offering a simple but attractive alternative to building multifunctional carbonaceous materials without using limited fossil resources. [6] The biomass-derived carbon has been utilized as a conductive material to assemble environmentally friendly and low-cost electronics on account of their renewable resources and nature structure. For instance, Wang et al. developed an ultrasensitive wearable strain sensor by combining carbonized silk and silicon substrate. [7] Zhang et al. prepared carbonized cotton fabric based stretchable strain sensors with high performance. [8] Wood is one of the richest natural sources of carbon, which possesses natural and unique 3D mesoporous structure with multi-channels. [9] These characteristics make wood an appropriate precursor to produce 3D porous carbon conductive networks. Although there have been several studies on wood-based flexible electronics, [10] the wood-derived carbon has not been investigated for tensile sensing. In general, the performances of carbon materials depend on the structure and properties of the carbonized precursors. [11] As one of the three major components of wood, lignin provides rigidity for wood, [12] which may affect the flexible utilization of carbon products. To further explore whether the presence of lignin affects the application of wood in flexible electronics, we took wood and delignified wood framework (DWF) as carbon precursors separately and discussed the electrical conductivity and potential for strain sensors of the two carbon products carbonized wood framework (CWF) and carbonized delignified wood framework (CDWF).Conductive carbon materials have recently received increasing interest for their potential applications in wearable electronics and electronic skins because of their adjustable structure and resistance. However, high cost, large energy consumption, and potential biological toxicity put a huge obstacle in the way of practical application in electronics. Bio-derived carbon, which possesses sustainability and low cost, is an ideal substitute for traditional carbon materials. Here, a facile and e...