Portable desktop computer

The invention discloses a portable desktop computer which comprises a box body, a switch door is rotatably connected to one side wall of the box body, a cover plate is movably connected to the box body through a hinge, a host and a display screen mechanism are placed in the box body, a partition plate is fixedly arranged in the box body, the partition plate divides the box body into a host placing groove and a keyboard placing groove, the partition plate is of an H-shaped structure, through grooves are formed in the partition plate and located in three side walls of the host placing groove, the host is placed in the host placing groove, and the keyboard is placed in the keyboard placing groove. First sliding grooves are formed in the two side walls of the box body, and the display screen mechanism comprises a display screen and a supporting mechanism. A main part of the desktop computer is stored in the box body, and the display screen is displayed when the desktop computer is used, so that the desktop comput