The invention provides a method for planting vegetable astragalus smicus to repair greenhouse vegetable successive cropping obstacles. On the middle ten days and the last ten days of September to thefirst ten days of November, furrows are cleaned after the preceding crop of vegetables are harvested, vegetable straw and weeds in a greenhouse vegetable field are cut off and moved out of the field or smashed and then evenly cover furrow compartments, then the field is irrigated with Paoma water or irrigated to be submerged for 2-3 days, then drainage and soil turning are carried out, the astragalus smicus is sown after compartment ditches are cleaned, and in the growth period of the astragalus smicus, water spray irrigation is carried out 1-2 times every week through greenhouse vegetable field facilities; when the astragalus smicus grows to the state that the plant height is 20-50 cm, the astragalus smicus is manually picked or mechanically divided into the compartments and partitioned or fresh and tender parts of tender shoots of the astragalus smicus are picked in a stripped mode, the picking time is from the bottom of November of the first year to the initial flowering period of the last ten days of March or the first days of April of the next year, astragalus smicus fresh grass non-watered ploughing and turning down are carried out in the full-blossom period of the astragalussmicus, during turning down, lime is cooperatively applied, field parcels are trimmed, and conventional vegetable planting is carried out after the furrows are cleaned. The weeds in the vegetable field are restrained and soil is fertilized by planting the astragalus smicus, soil organic matter is increased, the physical, chemical and microorganism properties of the soil are improved, and the soilof the vegetable field becomes more healthy.