The laser directly driven exploding pusher target has been demonstrated on Shengguang Ⅱ upgraded facility.The secondary DD neutron signal whose yield is 105~106 is obtained by the developed quenched liquid scintillator detector,and the primary DD neutron signal is measured by the ultrafast quenched plastic scintillator detector for the yield is 108~109.By deconvolution of the primary DD neutron waveform,the primary DD neutron time-of-flight spectrum and ion temperature is obtained.