The invention provides an omnibearing seedling pruning device, and belongs to the technical field of plant pruning devices. The omnibearing seedling pruning device comprises a support, an adjustor, aturntable and a pruning knife, and the support is connected with the turntable through supporting legs; the turntable is provided with a slide groove, the pruning knife is slidably installed in the slide groove, a slide block fixedly connected to the pruning knife can slide in the slide groove, a column groove is formed in a stirring rod on the adjustor, a column fixedly connected with the slide block on the pruning knife can slide and move in the column groove, an arc baffle sheet is further arranged on the outer circumferential face of the turntable, and a baffle is further arranged at the tail end of the stirring rod. The omnibearing seedling pruning device has the advantages that the device can prune seedlings in an omnibearing mode, sound cannot be given out during work, and silent work is achieved; the arc baffle sheet can shield an opening of the slide groove, the slide block is prevented from moving out of the slide groove, seedling juice can also be prevented from entering theturntable through the slide groove, the probability that the inside of the device is corroded is lowered, the service life of the device is prolonged, and a baffle handle can manually and limitlesslyadjust the radius of a pruning area, and the complexity of the device is lowered.