The invention relates to a fixture device capable of clamping any space complex pipelines. The fixture device comprises a test table and one or more clamping mechanisms arranged on the test table; thetest table is provided with multiple T-shaped grooves arranged in parallel; the clamping mechanisms are arranged on the test table by dint of the T-shaped grooves and T-shaped bolts, and can move onthe test table along the T-shaped grooves; the clamping mechanisms comprise L-shaped support bases, and hoop mounting bases with a twisting function; two cantilever surfaces of the L-shaped support bases are provided with strip vertical hole grooves and strip horizontal hole grooves; and the hoop mounting bases are arranged on the L-shaped support bases by dint of the vertical hole grooves and bolts, and can adjust the height on the L-shaped support bases along the vertical hole grooves. The fixture device is simple in structure, can meet degrees of freedom in six directions, and has the advantages of excellent clamping effect and no interference.