Potassium deposit in Feicheng city belongs to potassium-pegmatite vein type. It was formed by residual molten mass intrusion along cracks in later period of magma intrusion in later protogean period. Deposit vein distributes in groups. Large ores have circle-type structure. Potassium resource is very rich in this area. Ores bare in surface which is suitable for mining openly. Block ores in deposit has good quality and is easily chosed, which are good production materials in glass and pottery lines.