The invention discloses an air cylinder linkage plug pin type automatic tray supply warehouse. The air cylinder linkage plug pin type automatic tray supply warehouse comprises a rack assembly, a chainwheel conveying assembly, a sensor assembly, a plug pin assembly, a protection frame assembly and a power assembly' the power assembly comprises an air cylinder assembly and an engine assembly whichare arranged in a cavity formed in the middle of the rack assembly. Through fit between multiple sensors and an air cylinder and ingenious fit of the chain wheel conveying assembly, full-automatic continuous stable extraction and conveying of trays can be achieved, and the warehouse is portable and efficient; the air cylinder with an electromagnetic valve is used for lifting the trays, the characteristic of the electromagnetic valve is used, during power failure, the pressure can be kept, one-air-cylinder multi-stroke moving is achieved, in the key fit position in the midway, the air cylinderis lifted for staying, a vertically moving execution mechanism is reduced, and the warehouse is simple and reliable; a crank connecting rod mechanism is used, pushing of the air cylinder s converted into rotation of a plug pin shaft, the plug pin can be driven to be rotated out, separation of the trays can be achieved, and through shrinkage, the plug pin is driven to be reset.