The present invention discloses a multi-axial section and axial surface grinder and a method thereof. The grinder comprises a lathe, a power device, an eccentric wheel, a connecting rod, guide rods, a guide post pin, a push rod component, a grinding clamp and a grinding piece. The power device is fixed on the lathe; a first guide groove for regulating the eccentricity is formed on the eccentric wheel; two ends of the push rod component are provided with the guide rods; and a second guide groove is formed on each guide rod, and is matched with the guide post pin which is fixed on the lathe. Brake pieces are arranged on the push rod component; the grinding clamp is arranged between the two brake pieces of the push rod component and can slide on the push rod back and forth and leftwards and rightwards; a semicircular groove with the grinding piece inside is formed on the grinding clamp; and the grinding clamp is used in pairs, so that two semicircular grooves form a circular groove so as to clamp a shaft neck in the circular groove. The multi-axial section and axial surface grinder has the advantages of simple structure, convenience and practicability, convenient maintenance and disassembly and assembly, low cost, high processing precision, and fewer processes, time saving, and high grinding efficiency of grinding the shaft neck.