EJ-232 is a kind of plastics scintillator with fast time response and decay time, it acts as a neutron-to-light converter in the system of nuclear reaction measurement. Time characteristics of EJ-232 plastics scintillator are measured by using short-pulse laser to excit scintillator in size of Φ6 mm×1 mm and Φ6 mm×2 mm (excited at 263 nm). The results show that the rise time is less than 30 ps for EJ-232 plastics scintillator and the laser excited fluorescence decay constant of the scintillator are 0.6 ns and 1.1 ns. The neutron excited fluorescence decay constant of the scintillator is longer than the laser excited fluorescence decay constant.