The present invention provides a particle projection spatial imaging system, comprising a particle source for generating and accelerating a particle beam, a deflection coil set for deflecting the particle beam into a chronologically deployed dynamic 3D particle array, an exciting coil set for generating a magnetic field, and a scan control mechanism for controlling the particle source, the deflection coil set, and the particle exciting coil set. The particle projection spatial imaging system set forth by the present invention generates a 3D spatial image by generating and accelerating a particle beam by providing a particle source, deflecting the particle beam by using a deflection coil set to form a dynamic 3D particle array, and exciting particle bunches at corresponding pixel points in the array in a time-division manner by a particle exciting coil set to cause them to generate a radiation effect, and this particle projection spatial imaging system does not rely on a solid display medium, and can operate in the air and in vacuum. A 3D dynamic image can be generated by refreshing the scan control mechanism.