The invention discloses an integrated hydraulic system and a butt-joint type garbage truck with the same. The integrated hydraulic system comprises an oil tank, a hydraulic pump communicated with the oil tank, a check valve arranged on a pipeline of the outlet end of the hydraulic pump, a motor for driving the hydraulic pump, and a top-cover driving unit and a rear-door driving unit both communicated with the check valve. The rear-door driving unit comprises a first electromagnetic directional valve communicated with the check valve, a first balancing valve communicated with the first electromagnetic directional valve, and a rear-door opening oil cylinder communicated with the first balancing valve. The top-cover driving unit comprises a second electromagnetic directional valve communicated with the check valve and a top-cover opening oil cylinder communicated with the second electromagnetic directional valve. An oil return pipe is arranged between the first electromagnetic directional valve and the oil tank as well as between the second electromagnetic directional valve and the oil tank. The butt-joint type garbage truck has the advantages that the integrated hydraulic system is used for opening a top cover and a rear door, so that application needs of users can be met, part of devices are omitted, and production cost is reduced.