A carbon host capable of effectively and uniformly incorporating a high sulfur content is the key to the development of lithium-sulfur batteries (LSB). This study exhibits carbon nanotube microparticle as a sulfur host of a LSB cathode. Due to the macropores, our macroporous CNTPs achieved uniform sulfur infilteration without sulfur residue. Additionally, the macropores enhanced the micropore fraction and thereby improved the sulfur confinement. Our cathode showed a high reversible capacity of approximately 1300 m/g at a current density of 0.2 C even at a high sulfur content of 70 wt%. A high capacity retention of 74% was observed with a 10-fold current density increase.