The utility model discloses a join in marriage net and salvage handheld terminal of removal based on compass positioning system, including mobile network communication module, big dipper communicationmodule, signal intensity detector module and signal switching module, the signal intensity detector module includes first processor unit, a memory cell and signal acquisition element, signal switching module includes second processor unit, the 2nd memory cell and switch unit, the first processor unit is connected with a memory cell, signal acquisition element and the 2nd processing unit difference electricity, signal acquisition element is connected with the mobile network communication module electricity, the 2nd processing unit is connected with the 2nd memory cell and switch unit difference electricity, the switch unit is connected with big dipper communication module and mobile network communication module difference electricity. The utility model discloses realize to switch over between mobile network communication module and big dipper communication module, overcome the electric wire netting and joined in marriage and produce the not smooth problem of communicating by letter when net production recovery work ground lies in the mobile network blind area.