The invention provides a support frame structure of seeding device, characterized by installing the support frame on any seeding device. At least one seeding device is disposed on the support frame. The support frame includes a fixation base. The fixation base defines a hole for threadingly receiving a screwing element. The fixation base of the support frame is fixed at the fixation base of the seeding device through the screwing device. At least one support rod for assembling a seeding device is disposed on the support frame. Therefore, at least one seeding device can be fixed on various agricultural machines through the support frame, without having to additionally purchase a single-purpose seeding machine, thereby saving the cost for purchasing different farming machines and making assembly easy as well.本發明係在提供一種播種裝置之支撐架結構,主要係將該支撐架組設於任何一種農耕機上,並於支撐架上設有至少一組播種裝置,該支撐架係設有固定座,於固定座上設有供螺固元件穿設之穿孔,藉由螺固元件將支撐架之固定座固設於農耕機之固定座上,於支撐架上設有至少一供播種裝置組設之支撐桿,如此,藉由支撐架可將至少一組播種裝置予以固定於各種不同用途之農耕機上,無須另外購置僅具有單一播種用途之播種專用機,可節省購置多台機種之費用,且組裝極為方便。