The invention relates to the field of lithium ion batteries, in particular to silicon-based slurry and a preparation method and application thereof. Raw materials of the silicon-based slurry comprisea silicon-based material, a non-silicon-based ceramic material, a carbon material, a curing agent, a dispersing agent, a defoaming agent and a solvent, and the silicon-based slurry is obtained throughstirring, mixing, dispersing and filtering in batches. The carbon material and the silicon-based material are compounded, the capacity of the electrode material is improved through the silicon-basedmaterial, the volume expansion of the silicon material in the circulation process is inhibited to a certain extent by use of the carbon material, and meanwhile, the conductivity, the electron mobilityand the electrochemical stability of the silicon-based slurry are improved through the carbon material. The added ceramic-based material can play a role of a framework, so that the expansion of the silicon material is further inhibited, and the cycle performance is improved. The silicon-based slurry serves as a lithium ion battery negative electrode material, it is facilitated that the battery capacity and the high capacity retention rate cycle index can be improved, and the electrochemical performance is improved.