Water injection seeding machine

A water injection seeding machine comprises a sowing and fertilizing device and is characterized in that the sowing and fertilizing device is connected with a water injection device which comprises a water tank, a piston, a check valve and a water outlet; the part of a piston rod, which extends out of the water tank, is sheathed with a pressure spring; the piston is provided with a weep hole; the check valve is arranged at a center hole at the bottom of the water tank; two side surfaces of the water tank are respectively provided with a lifting sleeve; a fixed guide post penetrating through the lifting sleeve is arranged; and a long tension spring is arranged between the upper part of the fixed guide post and the lifting sleeve. Ridge busting is not needed when the water injection seeding machine is used, water is directly injected, and water use amount is fixed to be 13 to 15 tons per hectare of land, therefore, the water injection seeding machine saves a large amount of water resource, protects soil texture