A new kind of phase plate using a variable Bessel-like function is designed and fabricated. The amplitude part is the variable Bessel-like function and the phase part is the spiral phase plate. The design suppresses the beam′s sidelobes significantly by choosing a proper modulatd parameter. A pure phase plate can be gotten through an encoding method. After optimization of gray scale laser direct writing process, the new kind of phase plate is fabricated on the photoresist slide substrate. Performance of the modulated phase plate is verified by using beam intensity distribution, which is in excellent agreement with the theoretical prediction. The proposed method gives rise to a simple, reliable, and low-cost micro-optical element solution for the generation of high quality optical vortices.