A hydraulic machine, comprising: a support assembly; two main cylinder devices slidably connected with the support assembly, wherein each of the two main cylinder devices comprises a main cylinder assembly and a plurality of piston rods connected with the main cylinder assembly, the number of the plurality of piston rods is at least two or two sets, a hydraulic chamber is formed between the plurality of piston rods and the main cylinder assembly, the at least two or two sets of piston rods are arranged opposite to each other and move along a same straight line; when the main cylinder device is working, the hydraulic chamber has a spatial change, causing the at least two or two sets of piston rods to approach each other or move away from each other; a support worktable device comprising two single-sided support worktable assemblies capable of withstanding the same pressure and four movable worktables, the two single-sided support worktable assemblies are connected to the support assembly, and the two main cylinder devices are spaced from the two single-sided support worktable assemblies; and the two or two sets of piston rods project from each of the two main cylinder devices and are coupled to two of the four movable worktables; the hydraulic machine further comprises one double-sided support worktable assembly, the double-sided support worktable assembly comprises two opposite and coaxially fixed worktables, the two fixed worktables are fixedly connected, each of the two main cylinder devices is disposed between one of the two single-sided support worktable assemblies and the double-sided support worktable assembly, and the double-sided support worktable assembly is disposed between the two main cylinder devices; two pressing mechanisms are formed by the two main cylinder devices and the two single-sided support worktable assemblies, and another two pressing mechanisms are formed by the two main cylinder devices and the double-sided support worktable assembly; wherein the support assembly comprises a plurality of sliding rails, the two main cylinder devices are slidably connected to the support assembly through the sliding rails, and a sliding direction of the two main cylinder devices and the piston rods of the two main cylinder devices move in the same axial direction. a support assembly; two main cylinder devices slidably connected with the support assembly, wherein each of the two main cylinder devices comprises a main cylinder assembly and a plurality of piston rods connected with the main cylinder assembly, the number of the plurality of piston rods is at least two or two sets, a hydraulic chamber is formed between the plurality of piston rods and the main cylinder assembly, the at least two or two sets of piston rods are arranged opposite to each other and move along a same straight line; when the main cylinder device is working, the hydraulic chamber has a spatial change, causing the at least two or two sets of piston rods to approach each other or move away from each other; a support worktable device comprising two single-sided support worktable assemblies capable of withstanding the same pressure and four movable worktables, the two single-sided support worktable assemblies are connected to the support assembly, and the two main cylinder devices are spaced from the two single-sided support worktable assemblies; and the two or two sets of piston rods project from each of the two main cylinder devices and are coupled to two of the four movable worktables; the hydraulic machine further comprises one double-sided support worktable assembly, the double-sided support worktable assembly comprises two opposite and coaxially fixed worktables, the two fixed worktables are fixedly connected, each of the two main cylinder devices is disposed between one of the two single-sided support worktable assemblies and the double-sided support worktable assembly, and the double-sided support worktable assembly is disposed between the two main cylinder devices; two pressing mechanisms are formed by the two main cylinder devices and the two single-sided support worktable assemblies, and another two pressing mechanisms are formed by the two main cylinder devices and the double-sided support worktable assembly; wherein the support assembly comprises a plurality of sliding rails, the two main cylinder devices are slidably connected to the support assembly through the sliding rails, and a sliding direction of the two main cylinder devices and the piston rods of the two main cylinder devices move in the same axial direction.