CucCo1-cCl2-FeCl3graphite bi-intercalation compounds (GBIC's) have a c-axis stacking sequence of -G-I1-G-I2-G-I1-G-I2-G- (G = graphite layer, I1= CucCo1-cCl2layer, and I2= FeCl3layer). These compounds undergo magnetic phase transitions at Th, Tcu, Tcl, TSG, and TRSG(Th>Tcl>TRSG=TSG). depending on the Cu concentration. The phase transition at This related to a helical spin order. The phase transitions at Tcuand Tclare associated with a spin order of CucCo1-cCl2layers. The re-entrant spin glass phase below TRSGfor c≤0.4 and the spin glass phase below TSGfor c≥0.5 are due to the spin frustration effect occurring in FeCl3layers. The nature of these phases has been studied using SQUID DC magnetization and SQUID AC magnetic susceptibility.