A diode end-pumped Kerr-lens mode-locking in Yb∶YAG is got without using saturable absorber and hard diaphragm inside the cavity, instead five-mirror cavity is used. The moke-locking′s power is 20 mW, and the wavelength centers at 1038 nm, the repetition is 94 MHz, and full width at half maximum of spectrum bandwith is lager than 9 nm (FWHM), corresponding to a transform limited pulse width of <124 fs.