▎ 摘　　要

NOVELTY - Preparing composite anode of all-solid-state battery comprises (i) mixing anode active material with additive in the first solvent to obtain uniform slurry and coating on the surface of the anode current collector to obtain primary anode pole piece, the additive comprises conductive agent, binder, first lithium salt and second lithium salt as initiator, (ii) preparing a slurry of inorganic solid electrolyte and third lithium salt in a second solvent, and coating the slurry on the active material layer of the primary anode pole piece obtained in step (i) to obtain secondary positive pole piece, and (iii) drying the secondary positive pole piece from step (ii) under vacuum at 45-120degrees Celsius, preferably 85-95degrees Celsius for 1-24 hours, preferably 12-14 hours to obtain final product. USE - The composite anode is useful in all-solid-state battery (claimed). ADVANTAGE - The method: increases the contact area between the positive active material and inorganic solid electrolyte, and improves the ionic conductivity between the positive active material and the solid electrolyte in the solid battery, and is easy to produce solid-state batteries on a large scale on the basis of existing manufacturing equipment. The composite anode: improves the power density and cycle life of the solid battery. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: 1. composite anode of all-solid-state battery obtained by above method. 2. All-solid-state battery comprising a composite anode and a cathode, the composite anode is composite anode of the all-solid-state battery.