The utility model relates to a fire -retardant waterproof apron, it is including lapping clearance buckler, apron body, apron spacer screen, apron bottom wall and dry powder package, and apron body both sides are equipped with apron limit groove, and sealed holding strip is installed to apron limit inslot, and apron clearance buckler inserts in the holding strip is sealed in the apron limit groove of two adjacent apron, the apron bottom surface is equipped with laps the bottom wall, and the dry powder package is installed in lapping the bottom wall to it decides to press from both sides the fastening through the apron spacer screen. The utility model discloses a set up apron clearance buckler and dry powder package isotructure, effectively realized the waterproof flame retardant efficiency of apron. Simultaneously, through setting up singlechip, sensor isotructure, can in time report to the police, improve the security performance.