The time-of-flight spectra of laser induced plasma from BaTiO3 during polsed laser deposition were studied with an optical multichannel analyzer (OMA Ⅲ). The influence of the experimental conditions on the flight velocity of the ejected plasma was discussed based on the feature of their time-of-flight spectra. And it is concluded that the flight speed of the plasma depends mainly on the laser fluence incident upon the ablation target surface in the pulsed laser deposition process.