A laser diode end-pumped passively Q-switched Raman yellow laser based on Yb 3+∶YAG/Cr 4+∶YAG/YAG composite crystal is developed in this work. The passively Q-switched fundamental-frequency laser generated by the composite crystal passes through the Raman crystal YVO4 and the frequency-doubling crystal KTP, and finally obtains a laser output of 578.5 nm. A coupled cavity structure is used to reduce the loss of Raman light and frequency-doubled light, and an etalon is used to suppress dual-wavelength operation to improve the conversion efficiency of frequency-doubling. Experimental results show that when the pump power of the incident wavelength is 9.51 W, yellow light with a power of 183 mW, a wavelength of 578.5 nm, a pulse width of 6.537 ns, and a repetition frequency of 6.542 kHz can be detected.