The invention belongs to a solar application device, and particularly relates to a soil treatment device. A light gathering and heat returning type soil disinfecting and repairing device comprises an induced draft fan (1), an air outlet flue (2), a groove type multi-hook-face solar condenser (3), a glass cover plate (4), a double-layer glass vacuum pipe (5), a ventilation heat absorbing body (6), an insulating layer (8), a hot air cavity (7), a first-level metal heat exchange plate (13), a feeding hopper (10), a mushroom-shaped ventilation channel (16), a tail air backflow channel (9), an exhaust pipe (11), a natural vibration spring (15), a second-level metal heat exchange plate (17), a soil sliding conveying belt (18), a feeding air channel (14) and a discharging port (20). Soil is heated through high-temperature air heated through solar energy, then disinfecting and killing of injurious insects, pathogenic bacteria and weed seeds in the soil and separation of volatile organic compounds in the soil are carried out, the fossil energy does not need to be consumed, pollution to the soil is avoided, and food safety is effectively guaranteed.