The invention discloses a small pixel transmission and multi-information fusion high-speed security check system and a recognition method thereof. The high-speed security check system is formed by a halved belt type high-speed sorting machine and a control device for controlling the halved belt type high-speed sorting machine, wherein the halved belt type high-speed sorting machine comprises a classification device, a convey device and a sorting crossing; the control device comprises an all-dimensional bar code scanner, an X-ray check device, a light barrier switch detection subsystem, an external image collection subsystem and a physical parameter collection subsystem which are all communicated with a main control subsystem. The invention also provides a method for recognizing parcels through the small pixel transmission and multi-information fusion high-speed security check system; the system achieves a self-check function of a state of hazardous article check tester equipment and has a function of performing scientific area segment on organic matter, inorganic matter and mixture.