The invention discloses a continuous automatic truck loading and stacking system for material packages. The continuous automatic truck loading and stacking system comprises a rail 1, a horizontal beltconveyor 31, a speed adjusting belt conveyor 4, a package shooting belt conveyor 5, a package transfer mechanism 6, an inclined belt conveyor 7, a stacking machine 8, a swinging translation hanging bracket 9, a lifting hanging bracket 10, a hydraulic cylinder 11, a transverse package pushing device 12, a moving package stopping device 13, related measurement control systems and a driving device.After a truck for loading the material packages enters the designated zone, the continuous automatic truck loading and stacking system automatically measures the size and the position of a compartmentof the truck and automatically adjusts the width and the position of the stacking machine according to the measurement result so that the automatic truck loading requirements can be met. The continuous automatic truck loading and stacking system can replace an existing manual truck loading system, is directly arranged on the downstream portion of a production line of a packing machine and can completely adapt to production of existing packing machines, and continuous automatic truck loading and stacking of the material packages is achieved. Due to the fact that the width and the position of the stacking machine in the continuous automatic truck loading and stacking system can be automatically adjusted, the continuous automatic truck loading and stacking system is high in truck type adaptability and is not high in truck positioning requirement, and in the truck loading process, the truck loading and stacking work of the material packages can be completed without moving the truck.