The invention discloses a portable safety monitoring system, which comprises an intelligent wrist strap, a laser indicator and an intelligent mobile phone, wherein a first GPS positioning module operates on the intelligent wrist strap; the first GPS positioning module is used for positioning the intelligent wrist strap and generating a first positioning coordinate; the laser indicator is arrangedon the intelligent wrist strap and is controlled by a first control module to give out red laser; a second GPS positioning module, a warning module, a second control module and a distance calculationmodule operate on the intelligent mobile phone; the second GPS positioning module is used for positioning the intelligent mobile phone and generating a second positioning coordinate; the distance calculation module is used for calculating the distance according to the first positioning coordinate and the second positioning coordinate; and under the condition that the distance is greater than the reference distance value, the second control module is used for controlling the warning module to pop up a warning interface in a touch screen. The portable safety monitoring system has the advantage that the personal safety of children is greatly improved; and the reminding can be given when the children leave too far away from parents.