The invention relates to a floating type standing column die device and a construction process thereof. The floating type standing column die device comprises a motor and is characterized in that themotor is connected with a gearbox, the gearbox is connected with a transfer case, the transfer case is connected with a hydraulic motor, the hydraulic motor is connected with a hydraulic pump, the hydraulic pump is connected with a hydraulic cylinder, a template system is arranged on the inner side of the hydraulic cylinder and comprises an arc-shaped single plate, an engineering rubber block anda regulating plate, the arc-shaped single plate comprises an outer plate and an inner plate, a demoulding agent storage cavity is arranged inside the template system, a pressure controller is connected to one end of the demoulding agent storage cavity and connected with a liquid spraying nozzle, a liquid inlet pipe is connected to the other end of the demoulding agent storage cavity, an air nozzleis further arranged inside the template system, one end of the air nozzle is connected with an air compressor through an air conveying pipe, the regulating plate comprises a movable plate and a fixedplate, and a spring is arranged between the movable plate and the fixed plate. The floating type standing column die device is reasonable in structure, convenient to use, high in accuracy and high inconstruction quality.