The casting wedge spreader has been instead of traditional separation methods such as hammering and toothless saw cutting, can quickly separate the gating and riser from the casting, greatly improving the efficiency and quality of post cleaning work, without causing secondary damage to the casting, and reducing the production cost of the casting. In a short period of time, unskilled workers can easily learn to use it, and can easily work continuously, which also greatly improves the labor intensity and labor environment of workers.