This study concentrates more on biocomposite as a matrix, a derivative of Cashew Nut Shell Liquid (CNSL), and its development of Cardanol Resin (CR), along with coconut shell Particle (CSP) as a filler, obliging the environmental concerns as a mandatory one due to the pressure from the consumer, which forces manufacturing sector to seek some other alternative, as lucrative one is for betterment of the humanity also, thereby such sophistication of “green” composite with much potential application can easily thrive on. In this mix, the particle size (25, 50 and 75[Formula: see text][Formula: see text]m) and particle loading (0, 10, 20, 30 and 40%) on the CR were reinforced with CSP polymer matrix through compression molding. This is the assessed impact of morphological Scanning Electron Microscopy (SEM), while particles load on mechanical properties such as tensile strength, flexural strength, impact strength and the hardness. They can also see the absorption of water. While doing so, it has been clearly observed that the tensile strength and flexural strength values expanded up to 30% of particle content, for all particle sizes of the particles and afterward, we could note that it diminished for higher particle content. Experimental results indicated that the maximum tensile strength and flexural strength of 30% of CSP/CR composite increase for 25, 50 and 75[Formula: see text][Formula: see text]m by 31, 25 and 19% with that of 46, 37 and 27%, respectively, as compared with those of neat CR. The expansion of CSP in composite expanded the hardness and the % of water absorption. Scanning Electron Microscopy (SEM) of the composite surfaces demonstrates that there are genuinely better interfacial connection and appropriation between coconut shell particles and CR matrix.