The invention provides a Chinese chestnut and winter wheat mechanical stereo-cultivation method capable of allowing once-seeding and twice-harvesting to be conducted every year, and belongs to the field of mixed plantation of industrial crops and agricultural crops. The method includes the steps of firstly, conducting deep tillage, namely, conducting deep tillage by 0.8m in the time period when the daily air temperature is above 15 DEG C in the autumnal equinox; secondly, conducting rowing, namely, conducting rowing with plantation belts which are 4m wide, and reserving large agricultural machine turning edges which are 5.5m wide and arranged at the two ends; thirdly, applying fertilizers, namely, heavily applying farmyard manure formed by animal waste, applying the fertilizers 3-5 square meters per mu, conducting water backfill, and conducting watering in a drenching mode; fourthly, planting winter wheat, namely, seeding 12 rows of the winter wheat in the space on reserved chestnut tree planting rows; fifthly, planting Chinese chestnuts, namely, planting chestnut trees in furrows and rows in the first ten days of March with the 2m row spacing, conducting ridging to form water furrows and water rows, and conducting earth covering along with plantation; sixthly, conducting toiling, namely, removing weeds out of furrows in the crop growth period; seventhly, conducting harvesting, harvesting Chinese chestnuts in the middle ten days of September, and harvesting the winter wheat in May in the next year; eighthly, allowing the earth to be idle, namely, removing seedlings and leveling the earth to allow the earth to be idle after harvesting is completed. By means of the method, the production efficiency that 200-300kg of crops are harvested per mu every year can be achieved.