Abstract: In order to eliminate the negative effects of straw returning to the field and improve the soil properties, this study used pepper（Capsicum annuum L.） as a crop and facility continuous cropping soil as the treatment object, the experiment used no treatment as a control, and studied the high temperature stuffy shed, conventional strong reduction, strong reduction straw returning to the field, chemical effects of trichloronitromethane fumigation and flooding on physical and chemical properties of facility salinized soil and the growth of pepper. The results showed that, compared with other treatments, the strong reduction straw returning treatment reduced the soil EC value to the lowest, with less salt return. The effect of killing pathogenic bacteria is good, no chemicals are needed. The incidence of diseases is lower; the growth of pepper roots and plants is promoted. The yield of the pepper is the highest, the rate of missing plants is the lowest, and production safety is higher.

Key words: strong reduction, straw returning to the field, facility soil, salinization, pathogenic organisms