The invention relates to a pressure-adjustable combined-type outer fixing support for clinical orthopedic application. Combining forms of the pressure-adjustable combined-type outer fixing support include a single arm type, a semi-ring type and a ring type, fixing clamping blocks include knitting needle clamping blocks and knitting rod clamping blocks, a pressure-adjustable fixing arm is composed of an adjusting shaft, an adjusting nut, a sliding fit thread sleeve, an elastic device, a fastening nut and a fixing rod, the adjusting shaft is radially provided with a retaining spring pin, a fixing ferrule, a graduated sleeve and a sliding sleeve, the sliding fit thread sleeve is radially provided with a limiting pin, a limiting jack screw and a fastening jack screw, and the elastic device is composed of a spring, a pressure sensor, a connecting pipe and a pressure displayer and can be provided with a piezometer or not. The pressure-adjustable combined-type outer fixing support can transmit stress to enable stress to be generated at a fracture end, stress shielding can be avoided, and delayed fracture healing and fracture disunion are prevented.