Toluene has been suggested as an important aromatic compound in the atmosphere of Titan. The reaction of toluene with cyano radical (CN) is a crucial channel to incorporate nitrogen into Titan's molecular weight growth model, which ultimately leads to the brown appearance of Tit an's atmosphere. Previous studies have shown very fast rate coefficients between CN and unsaturated compounds including aromatics at low temperatures. Recently, Messinger et al. investigated this reaction by the pulsed laser photolysis-laser-induced fluorescence (PLP-LIF) technique and quantum chemical calculations, indicating that t he rate constants of CN + toluene between 15 and 294 K are independent of temperature, with an average value of (4.1 ± 0.2) × 10 -10 cm 3 molecule -1 s -1 , at the total gas density from 2.7 to 10.5 × 10 16 cm -3 . Trevitt et al. have measured the rate coefficients of toluene + CN to be 1.3×10-10 cm 3 molecule -1 s -1 using a pulsed Laval nozzle expansion in conjunction with laser-induced fluorescence (LIF) at 105 K and 4 Torr. In addition, the reaction products of CN with toluene were detected by using tunable synchrotron VUV photoionization mass spectrometry. The experimental results also revealed that the main product of the reaction is cyanotoluene. Scheme 1 illustrates four possible reaction products of toluene + CN. CN adds to the benzene ring then removes a hydrogen atom to generate ortho, meta , or parasubstituted products. It may also substitute the methyl group to generate benzonitrile. In recent years, benzonitrile, as one of the simplest aromatic derivatives, has detected in the cold-core Taurus Molecular Cloud 1 (TMC-1). It provides an important reference for th e formation mechanism of PAHs (polycyclic aromatic hydrocarbons) in the ISM (interstellar medium). No evidence of benzonitrile formation was observed in the which has attracted great attention in the gas phase chemistry communities including atmosphere, interstellar and combustion, etc . It is also necessary to determine the ionization and dissociation rates of astrochemical interest in the field of radiation. Adam et al. measured a series of aromatic hydrocarbons at 10.5 eV for quantitative analysis of complex organic mixtures. Zhou et al. determined the absolute photoionization crosssections of some aromatics and aromatic derivatives, helping quantitative analysis of combustion intermediates. Recently, Jin et al. added the photoionization cross-sections of 12 aromatic hydrocarbons using tunable SVUV-PIMS. Comparing with the abundant data reported for aromatic hydrocarbons, the photoionization cross-sections of nitrogen-containing aromatic compounds are very scarce.