The invention discloses a seed sowing machine which comprises a shell, a first partition plate, a compression bar, a spring, two conical nozzles, two first connecting rods, a driving tooth, a seed discharging mechanism and a collecting tank. The first partition plate is arranged in the shell, an inner cavity of the shell is divided into a mounting cavity and a seed discharging cavity by the first partition plate, and the two conical nozzles are hinged onto the side walls of a discharge outlet and are connected with the compression bar by the two first connecting rods; the compression bar is movably inserted in the mounting cavity, the upper end and the lower end of the compression bar penetrate the side walls of the shell and extend out of the shell, the spring sleeves the compression bar, the upper end and the lower end of the spring are correspondingly butted onto the inner wall of the mounting cavity and the compression bar, the seed discharging mechanism is arranged in the seed discharging cavity, the driving tooth is connected onto the compression bar, an end of the driving tooth penetrates the first partition plate and meshes with the seed discharging mechanism, and the collecting tank is fixed into the seed discharging cavity and is arranged above the seed discharging mechanism. The seed sowing machine has the advantages that the seed sowing machine is small, light, trouble-saving and labor-saving and can be flexibly used, the labor intensity can be relieved for farmers to a great extent, and the production efficiency can be improved.