This article studies co-pyrolysis of combustible municipal solid waste (MSW) without/with additives (CaO, CuCl2, zeolite powder, and MnO2). Co-pyrolysis of different MSW components mixing and adding additives in co-pyrolysis could change yield of oil, high heating value (HHV), and products distribution. The yield of oil increases noticeably, but HHV decreases with ratio (sawdust: paper) increasing. Moreover, the yield of phenols increases. After adding fabric, the yield of acids and alcohols increases and that of aldehyde decreases. The yield of oil decreases after adding CaO and MnO2, and HHV of co-pyrolysis increases after adding CaO, zeolite powder, and MnO2. Adding MnO2 has the most impact on the decrease of aldehyde, and adding CuCl2 has the biggest effect on phenol reducing. The yield of ketone is affected most greatly by adding CaO.