The invention belongs to the field of lasers, and particularly relates to a femtosecond laser for material processing, and is characterized in that a bimirror refraction block is fixed at one side of a pulse light source and an optical resonator, a totally-reflecting mirror is fixed between the bimirror refraction block and the optical resonator, a semi-reflecting mirror, a prism A, an optical axis drift correction lens, a prism B and a beam splitter are fixed at the other side of the optical resonator in sequence, a thin lens A, a frequency doubling crystal A, a laser output coupling mirror A and a focusing lens A are fixed at one side of the beam splitter in sequence, a thin lens B, a frequency doubling crystal B, a laser output coupling mirror B and a focusing lens B are fixed at the other side of the beam splitter in sequence, laser output ports arranged on a laser shell and extends outward to form laser output port fixing trays, reflectors are fixed outside the laser output ports respectively, and fixing groove covers of reflector shells sleeve the outside of the laser output port fixing trays and are fastened through bolts.