Abstract: In this stage,by referring to the hand developing machine of widespread use and the fully automatic developing machine,a portable,vehicle-mounted,quick disassembly,power adjustable,heated,integrated control module,semi-dry portable car developing machine has been developed.The machine can operate normally in the project vehicles and in confined space with good mobility.Through the application of engineering practice,it shows that the processor has the advantages of flexible,portable,rapid assembly and disassembly,stable performance,and it can meet the needs of field,long distance and small batch.The machine can also meet the requirements for high processing quality and for project tight schedule of X-ray detection.