Abstract: In order to solve problems of pesticide residues，food safety and environmental pollution caused by traditional chemical control in continuous cropping of soil，a mobile soil high-temperature steam disinfection machine was introduced and technical feasibility was analyzed.According to field experiment and data analysis，the number of tomato root-knot nematode could be significantly reduced and damage of tomato root-knot nematode could be effectively controlled by using high temperature steam treatment technology for 2 hours.Results showed that nematode degradation rate of root-knot nematodes was 92.9% after 2 days of high temperature steam treatment.Control effect of mobile soil high temperature steam disinfection on tomato root-knot nematode was up to 92.7%.This study provided a physical control method for tomato root-knot nematode，and provided a new way to overcome obstacles of continuous cropping in soil.