Replaceable sowing and harvesting device

The invention relates to a replaceable sowing and harvesting device. The device comprises a horizontal fixing support and a vertical fixing support which are connected by welding, wherein a pluralityof screw holes of different specifications are formed in the horizontal fixing support and the vertical fixing support by drilling and used for installing a sowing module and a harvesting module. Sowing and harvesting functions are integrated on the device through modularization. The sowing module and harvesting module can be selectively installed as required on the fixing supports. Different modules are relatively simply dismantled or installed through bolt structures, so that the device serves several purposes of sowing and harvesting. A user only needs to purchase one device to achieve twokinds of completely different work, namely sowing and harvesting, through simple dismantling and installation. The farming cost is greatly saved, as well as labor. The device has the advantages of flexibility, firmness, high a