Abstract: VLS theory can be efficiently used in the analysis of one dimension carbon material synthesis. Under the catalytic effect of nickel particles, spring-like carbon filaments were synthesized through microwave plasma chemical vapor deposition. Based on the formation mechanism of carbon filaments and VLS theory, a simply and efficient diffusion model was proposed to analyze the effect of catalyst on the morphology of quasi-one-dimension carbon materials. It shows that differ in the diffusion rate along the circumference of catalyst is the main reason for the curly growth of carbon materials.