The purpose of this research is to process a mixture of paper waste and garden waste based on material flow analysis and to analyze parameters based on parameters of water content, ash content, heating value, along with Thermogravimetry Analysis (TGA)/Derivative Thermogravimetry (DTG). The garden waste treatment process consists of shredding, drying with a rotary dryer, separator, and then shaving with a hammer mill. Paper waste only needs a shredder and siege process. Then the mixing process and pelletizing of paper waste and garden waste are carried out according to the variation (w/w) 100% paper (K100), 75% paper (K75), 50% paper (K50), 25% paper (K25), and 100% garden waste (K0). The water content ranged from 5.8 to 15.25%. The ash content was seen from K0 to K100 samples that the ash content increased from 4.54 to 9.85%. A correlation of 0.9047 was found from the samples K0 to K100. There was an increase in the correlation between increasing the calorific value if the mixture with paper waste increased. The caloric value in K0 to K100 increased from 13.11 to 19.03 MJ/kg. The TGA/DTG analysis reduced mass due to water evaporation, devolatilization, and carbonization processes.