The invention discloses a material splitting device. The material splitting device comprises a material splitting table, wherein a material storage device with a material guide port is arranged on thematerial splitting table; a material splitting device supported by a support is correspondingly arranged below the material guide port; a gas source treater is arranged behind the material splittingdevice; by matching a material pressing mechanism, an air pipe and a material feeding plate and monitoring by means of a monitoring device, a driving device which controls a first material splitting plate and a second material splitting plate to act correspondingly so as to achieve the effect of automatically sorting unqualified products. Workpieces are split by a mechanical means, so that the material splitting speed is accelerated, the material splitting efficiency is improved, plants are liberated from heavy hand labor, the labor cost is lowered, and mechanical automatic production of the plants is achieved. Moreover, the error rate of manual sorting is avoided directly, and the product percent of pass is improved directly and effectively.