$Si_3$$N_4$ ceramics have been identified as one of the promising structural ceramics. This study has been carried out to investigate of the synthetic behaviors of $Si_3$$N_4$ derived from domestic silica-stone by direct nitriding method. The silicon nitridation reaction has been studied in the temperature range of $1300～1550^{circ}C$. Below the $1400^{circ}C$, the nitriding rate was measured to be 16%. For the temperatures higher than the $1400^{circ}C$, $eta$-$Si_3$$N_4$ phase was formed mainly, and the nitriding rate showed above 98%. With the increasing of sample weight of silicon powder, the nitriding rate and $eta$-$Si_3$$N_4$ phase increased at $1400^{circ}C$ for 2 hours. The shape and particle size of$ Si_3$$N_4$ powder synthesized at $1400^{circ}C$ for 2 hours showed the irregular angular-type and 10 $mu extrm{m}$, respectively.