The invention discloses an automatic loading system for a lithium battery. The automatic loading system for the lithium battery comprises a powder putting system, a solvent putting system, a stirringmachine, a transferring tank, a coating feeding system and a control system, wherein the coating feeding system comprises a diaphragm pump, an iron removing device, a coating storage tank, a coating die head and a return pipe arranged on the coating storage tank and connected to a pipe between the diaphragm pump and the transferring tank, a return pipe valve is arranged on the return pipe, and thecoating storage tank is provided with a stirring device and a non-contact liquid level sensor. During coating, when the liquid level in the coating storage tank reaches the certain height, a discharging valve of the transferring tank is automatically switched off, the transferring tank is vacuumized, then vacuum breaking and defoaming are carried out, the uniformity of coating slurry is guaranteed, and when the liquid level is lower than the certain height, materials are fed into the coating storage tank; when the system is stopped for a long time, the discharging valve of the transferring tank is automatically switched off, the return pipe valve is automatically switched on, automatic cycling of coating slurry in the transferring tank is achieved, and blocking caused by material accumulation and material drying is prevented.