The invention discloses a chain transmission type ridge crushing box, which comprises a box body, a driving chain wheel, a driven chain wheel, a chain, a bearing cover, a shaft, a bearing, a box body with a bearing seat, and a coupling, wherein the driving chain wheel is fixedly connected with a power source, the shaft and the chain wheel are coaxially and fixedly connected, and are fixedly arranged on the bearing seat of the box body through bearing support, the bearing cover is connected with the bearing seat through a fastener, the driven chain wheel is connected with the driving chain wheel through the chain, and the coupling is connected with a spiral drill bit. The chain transmission type ridge crushing box has the advantages that the lubricating requirement is lower, the sealing of the box body is not needed, the processing is convenient, the interchangeability is good, and the assembly and maintenance are convenient; the deep tillage and loosening effects of soil can be further improved, and more air can exist in the soil.