Portable data processing terminal of modularization

The utility model provides an among the portable data processing terminal of modularization, includes the preceding shell of main part, main part backshell, main circuit board, display panel module, master control keypad, scanning head module, scanning head support, wherein display panel module, master control keypad, scanning head module are passed through the FPC line and are connected with main circuit board, shell and main part backshell fixed connection before the main part, each module all is independent setting to be connected with main circuit board through the FPC line, rather than integration on a circuit board, can fix a position fast when the machine breaks down like this, the quick replacement maintenance, thereby shorten maintenance duration, reduce and keep in repair, wherein in the scanning head module, wherein the back top of main part backshell is equipped with an oblique decurrent scanning opening, contained angle between scanning opening and the water flat line is 35, and this product stru