One-dimensional graphene fibers have attracted increasing interests due to their extraordinary mechanical strength, electrical conductivity and flexibility compared with two-dimensional graphene films/papers and three-dimensional foams/hydrogels/aerogels. Here, we developed a scalable non-liquid-crystal spinning process for the production of continuous graphene fibers with tailored structure for high-performance wearable supercapacitors. These fibers possessed surfaces with bark-like fine microstructure and different shaped cross-sections with locally aligned dense pores, depending on the jet stretch ratio ( R ) during spinning. Owing to this unique structure facilitating the access to, and diffusion of electrolyte ions, the specific capacitance reached 279Fg−1 (340Fcm−3) at a current density of 0.2Ag−1 (0.244Acm−3) in 1M H2SO4 when R =1.0. A flexible solid-state fiber supercapacitor assembled from these fibers showed a specific capacitance and energy density of 226Fcm−3 and 7.03mWhcm−3 at 0.244Acm−3, respectively. We further demonstrated the proof-of-concept of wearable energy-storage by sewing three solid-state yarn supercapacitors in series into a textile, which was able to power a light-emitting diode for more than 5min after being charged. This non-liquid-crystal spinning strategy could be extended to the assembly of other two-dimensional nanomaterials into macroscopic fibers for applications in micro-devices, wearable electronics and smart textile.