The present invention relates to an improved structure of a suction needle of a seeding machine. The upper end of the suction needle is a bolting portion, and a buckle is arranged on the bolting portion, and the lower end of the needle is a needle tube portion, which is opened on the bottom surface of the needle tube portion. There is a pore, the pore is in communication with the gas flow channel in the middle of the suction needle, and the pore diameter of the pore is smaller than the inner diameter of the gas flow passage, because the pore diameter of the bottom surface of the needle portion at the lower end of the suction needle is smaller than the inner diameter of the middle air flow passage of the suction needle If the suction needle absorbs debris impurities when sucking the seed, the debris impurities will not get caught in the air flow passage, causing a blockage.本創作係有關一種播種機之吸種針結構改良，該吸種針之上端為栓接部，於栓接部上設有扣環，吸種針之下端為針管部，於針管部之底面開設有氣孔，該氣孔係與吸種針中間之氣流通道相通，且該氣孔之孔徑小於氣流通道之內徑，因吸種針下端針管部底面之氣孔孔徑，小於吸種針中間氣流通道之內徑，若吸種針於吸取種子時有吸到碎屑雜質，碎屑雜質不會卡在氣流通道內，而造成有堵塞之情形者。
