The article presents the results of experimental studies of the combustion of silicon-fluorine-organochlorine compounds systems (fluoroplastics grades F-3, F-32, F-4, F-40, F-42) in the range of changing the ratio of components from 10 to 90% of the mass . fuel content. The burning time and energy illumination in the spectral range of 0.5-20.0 microns were assessed according to the standard GOST 2389-70 method. Based on the measurements obtained, the burning rate was calculated. An extreme dependence of combustion parameters with maximum values of linear combustion rate and energy illumination at a fuel content of 50 wt.% was established. Concentration limits of flammability have been determined. It has been established that the concentration limit of flammability for the silicon - F-3 and silicon - F-40 systems is 40 - 80 wt%. fuel content; silicon - F-32 - 40 - 75% wt. fuel content; silicon - F-42 and silicon - F-4 - 40 - 70% wt. fuel content. Within these limits, stable combustion is maintained, while the compaction coefficient becomes smaller with increasing silicon content. The highest values of energy illumination are achieved for the silicon - F-4 and silicon - F-40 systems and amount to 360-380 W/m2. The nature of the resulting solid combustion products depends on the ratio of the components. Up to a fuel content of 50% wt. during combustion, soot is intensively formed. Microscopic analysis of these products showed that they are thread-like formations. Further, when the silicon content increases to more than 50% wt. the amount of soot in combustion products is reduced. A solid combustion product is formed in the form of regular rings.