The invention relates to an electric vehicle remote control alarming device based on an AT89C51singlechip. According to the electric vehicle remote control alarming device based on the AT89C51singlechip, whether a wireless signal is sent or not is judged firstly, and if the wireless signal is sent, the wireless signal is read in; then whether the signal is a fortification relieving signal or not is judged, if the signal is the fortification relieving signal, a burglar alarm relieves fortification, and whether a new wireless signal is sent or not is judged by a system; if the signal is not the fortification relieving signal, whether the signal is a fortification signal or not is judged; if the signal is the fortification signal, the fortification response is successful; if the signal is not the fortification signal, whether the fortification response is successful before or not is judged, if the fortification response is successful, whether the signal is a vehicle finding signal or not, and if yes, music sounds to prompt the parking place for a vehicle owner; if not, whether a new wireless signal is sent or not is continuously judged; and after the fortification response is successful, the vibration triggering alarm interrupt subprogram is carried out as long as a triggering signal sent through vibration inductance is received, and if not, whether a new wireless signal is sent or not is continuously judged.