There are three main patterns of straw returning to the field in China: shallow incorporation, surface mulching and, turnover straw with moldboard plow. The shallow incorporation generally causes too much arge pore in the soil while surface mulching will lead to the decrease of ground temperature and the increase of diseases and insect pests in some areas; due to the inability to break the bottom layer of the plough, the effect on lifting the soil organic matter content of the whole soil layer (especially the subsurface layer) is limited. Turnover straw with Moldboard plow consumes more power and charge expenses; in addition to soil layers turnover, the practice induces yield reduction in some areas, and a complexity to manage soil on the following year due to the undercover of undecomposed straw.【Objective】In view of the handicaps caused by long-term shallow tillage, such as the lack of organic matter in the subsurface layer of soil, over-compaction, and the high cost or poor effect of straw return to the field, this paper proposes a simple and effective new pattern of straw returning and the corresponding machine innovation and field engineering technology. The purpose of this engineering technology consist into resolving the bottleneck problem of high cost or poor effect of straw returning to the field, also to provide mechanization means for the straw treatment of upland field and the construction of fertile plough layer.【Method】This technical model is based on the new concept of prioritizing soil subsurface fertilized layer and the enriched straw buried in the soil subsurface layer of the designated belt where strip tillage loosing soil. This new technique is called straw enrichment and deep burial（SEDB).The main engineering technology of this model is the invention of a new straw deep return cylinder plough which can enrich, crush and bury the straw into the soil by means of mechanization. The specific steps include:(1) enrich the corn straw by 4:1～8:1 with the finger-plate rake;(2) the corn straw is buried into the 20～40 cm depth of subsoil in the designated strip with wind-driven injection cylinder plough; (3) the non-buried straw belt is seeded with the no-tillage planter in a normal way to realize the separation of seed planting belt (narrow rows) from straw strip (wide rows) in wide-narrow rows cultivation mode.【Result】This model has the advantages of moldboard plow and mulching of straw. However, it overcomes the disadvantages of both. It is the perfect combination of straw returning to the field and strip minimum tillage. The corn straw, being fully mechnized, can be returned to the field along with each agricultural campaign, without disrupting the sequence of soil layers and affecting the planting in the next year.【Conclusion】The concept of straw enrichment and deep burying is novel and the technology is feasible which has a positive effect on improving soil fertility especially subsoil fertility.