Discharging resistor installation structure of built-in housing capacitor with improved heat dissipation and light weight

The present invention provides a discharging resistor installation structure of a built-in housing capacitor with improved heat dissipation and light weight. The built-in housing capacitor comprises: capacitor elements formed by reeling dielectric films, each having two sides with conductive thermal spraying surfaces; a housing having an element arrangement space for internal installation and arrangement of the capacitor elements; first and second bus bar formation portions electrically connected with the conductive thermal spraying surfaces of the capacitor elements; and a discharging resistor installed at the outer side of one surface of the housing and configured to discharge charged residual charges in the capacitor to avoid contact incidents when the capacitor is separated from an input terminal. The discharging resistor is installed outside of the rear board of the housing, the housing comprises staggered floor portions for carrying the discharging resistor formed at the outside of the rear board, and the staggered floor portions for carrying the discharging resistor are formed by two first and second staggered floors which horizontally and mutually separately protrude outwards in an opposite direction.