TiO

2

and La

2

O

3

doped TiO

2

films were deposited by means of the RadioFrequency magnetron sputtering technique. The influences of doping La

2

O

3

on the microstructure

optical properties and blood compatibility of TiO

2

film were investigated by using X-ray diffraction (XRD)

scanning electron microscopy (SEM)

UVvisible optical absorption spectroscopy and tests of platelet adhesion

respectively.Results show that doping La

2

O

3

is beneficial to the preferential growth of the (110) plane of rutile phase and can refine grain size of TiO

2

resulting in an increase of optical band gap from 2.85 to 3.2eV. The quantity and morphology of the adherent platelets on the surface of samples indicated that La

2

O

3

doped TiO

2

film is potentially useful biomaterials with good blood compatibility. The mechanism of haemocompatibility of TiO

2

film doped La

2

O

3

was analyzed and discussed.