The invention belongs to a nuclear power station primary loop system and the field of the nondestructive testing technology in other industries and in particular relates to a combined type ultrasonic-eddy current detection probe clamping structure. The combined type ultrasonic-eddy current detection probe clamping structure comprises a base body structure and a probe driving four-link mechanism, wherein the base body structure comprises a water level measurement ultrasonic wave normal probe (1), a miniature coaxial cable socket (3), a guide housing (4), a cable socket mounting base (5), a probe cable and a miniature coaxial cable plug (10), a multi-core cable plug (17) and a coaxial cable bundle (18); the probe driving four-link mechanism comprises a compressed spring nut (6), a compression spring (7), an upper part compression ring (8), a probe lining plate (9), a core pipe (11), a novel combined probe (12), a connecting rod (13), an ejection rod (15) and a base (20). The combined type ultrasonic-eddy current detection probe clamping structure has the beneficial effects that the detection probe and the surface of a detected object are enabled to be fitted well, the compression force is enabled to be uniform, the probe is tightened up and is enabled not to be damaged when in installation, water-leaching coupling water is guaranteed to be sufficient and superfluous water is prevented from overflowing.