Multifunctional seed sowing machine

The disclosed is a multifunctional seed drill. A stubble-breaking plough and a covering plough are respectively fixed at both ends of a longitudinal beam which is fixed under a cross beam. A seed manure box is fixed at the upper portion of the cross beam, with a fertilizer applicator fixed at the lower portion of the seed manure box. A fast headstock is fixed at both ends on two sides the cross beam, a chief shaft is fixed on the fast headstock, an auxiliary shaft is fixed on a lateral support board at the lower portion of the seed manure box, and two land wheels are fixed at two ends at the lower portion of the cross beam. A colter boot and the longitudinal beam are alternatively fixed at the lower portion of the cross beam, and a ditch-expanding device is fixed on a seed sowing device. A driving chain and a driving wheel of the land wheel chief shaft are connected on the land wheel and the chief shaft, a driving chain and a driving wheel of the chief shaft auxiliary shaft are connected on the chief shaft and the auxiliary shaft, which are all at the lower portion of the seed manure box. A driving chain and a driving shaft of the chief shaft seed-sowing device are connected on the chief shaft and the seed-sowing device. Two ends of a seed delivery tube are respectively connected with the seed manure box and the seed sowing device. A garden roller is fixed on the seed-sowing device, and the chief shaft is provided with a ridge-adjusting chain wheel. The multifunctional seed drill has the advantage that the multifunctional seed drill has the functions of stubble-breaking, fertilizing, seeding, soil covering, rolling, adjustable two ridges and three ridges in one body.