The invention discloses a gas-liquid pressurization cylinder. The gas-liquid pressurization cylinder is formed by the fact that a
gas pressure cylinder body and a
hydraulic cylinder body are in series connection through a middle cover with a middle hole and are separated into a pressurization gas cavity, a pre-pressing gas cavity, a pre-pressing
oil storage cavity, a pressurization oil cavity and a
stroke returning gas cavity through an upper end cover with a gas guide
pipe, a pressurization
piston with a hollow pressurization rod, a
gas separation piston, the middle cover with the hole, a working
piston and a lower end cover. The pressurization gas cavity, the pre-pressing gas cavity and the
stroke returning gas cavity are respectively communicated with an exterior gas circuit through respective connectors, and the working processes of the pre-pressing
stroke, the pressurization stroke and the reset stroke can be achieved through the control over the gas circuit. Compared with an existing gas-liquid pressurization cylinder, wherein the existing gas-liquid pressurization cylinder is provided with three or more cylinder bodies, and the cylinder bodies are in parallel connection or in serial connection, the gas-liquid pressurization cylinder has the advantages of being exquisite in structure, convenient to
machine and high in use efficiency of a gas source. In addition, the design of the structure of conducting reasonable guiding and preventing rotation is added on an output working
piston rod of the cylinder, and the installation and application of subsequent use are simplified.