Measurements of dust plasma parameters were carried out in the discharges of (SiHa/C2Ha/Ar) mixtures.Dust particles were formed in the capacitively coupled radio-frequency discharge of these reactive mixtures in a cylindrical chamber.Langmuir probe was employed for diagnosing and measuring the important plasma parameters such as electron density and electron temperature.The results showed that the electron density dropped,and in contrast the electron temperature rose when the dust particles formed.The curves of the electron density and temperature versus the RF power and pressure were presented and analysed.Further,it was found that the variations of electron temperature and the size of dust void with the RF power followed the similar trends.These trends might be useful for understanding more about the characteristics of dusty voids.