To understand the effect of argon on the air gliding arc plasma, an air gliding arc plasma was generated at a discharge frequency of 10 kHz and an atmospheric pressure with q_Air=15 L·min^-1 to study the effect of Ar volume flow on air-Ar gliding arc discharge. And then focused on the analysis of the active particle species, electron density and vibration temperature of air gliding arc plasma under different Ar volumetric flow rates and voltage of the voltage regulator. The results show that the main active particles in the gliding arc plasma region are OH, the second positive band system of N₂, H_α, O atoms, Ar Ⅰ and Ar Ⅱ atoms. It is found that the relative spectral intensity of O and ArⅠ, ArⅡ atoms is strong. With the increase of Ar volume flow, the relative spectral intensity of O(777.4 nm) increases slowly at first, then quickly increases to a maximum value, then slowly decreases and tends to stabilizes, and the relative spectral intensity of O(777.4 nm) varies between 1 580~6 650 a. u. The relative spectral intensity of O(777.4 nm) increases as the voltage of the voltage regulator increases. Moreover, the influence of voltage of the voltage regulator on the relative spectral intensity of O(777.4 nm) is affected by the volume flow of Ar: The relative spectral intensity of O(777.4 nm) changes significantly under high Ar volume flow (4~6 L·min^-1). The addition of Ar significantly increases the relative spectral intensity of OH (313.4 nm), the relative spectral intensity of OH(313.4 nm) varies between 235~311 a. u. As the volume flow of Ar increases, the relative spectral intensity of OH(313.4 nm) first increases and then decreases and tends to stabilize. At a lower voltage (100 V), the relative spectral intensity of OH(313.4 nm) does not change significantly with the volume flow of Ar. As U_R increases, the relative spectral intensity of OH (313.4 nm) changes significantly with the volume flow of Ar: at low Ar volume flow (0~4 L·min^-1), the relative spectral intensity of OH (313.4 nm) increases significantly with the increase of Ar volume flow. A Gaussian fitting is made with the H_α spectral lines to analyse and calculate the electron density. It is found that the electron density is between 1.15~2.04×10¹⁷ cm^-3. Keeping the air flow constant, the addition of Ar can significantly increase the electron density: when q_Ar is 0~4 L·min^-1, the electron density has an apparent growth trend. As q_Ar continues to increase, at lower U_R (100~120 V), the electron density first increases and then decreases and tends to stabilize. At the higher U_R (140~160 V), the electron density first increases and then slowly increases and tends to stabilize. The change of the U_R will also affect the electron density. The electron density increases with U_R, and as the U_R increases, the electron density growth trend becomes faster.