The scheme of Nd∶YAG and Nd∶YVO4 crystal composite application is proposed. The Nd∶YAG crystal with good thermal conductivity and optical properties is used as the front end of pump light absorption crystal, and placing a wider absorption spectrum Nd∶YVO4 crystal at its rear-end to absorb the pumping light energy composition, which is not absorbed by Nd∶YAG crystal due to the spectral width does not match. Two kinds of crystals in the 1064 nm wavelength emission spectrum overlap each other. The absorption of pump light energy can be converted to common oscillation laser wavelength, the efficiency of pumping light is improved. The proposed composite applications can effectively reduce the oscillating light power changing with pumping source working temperature fluctuations. Experimental results show that the proposed composite application scheme improves the optical-to-optical efficiency of pump sources by 22.9%, and the sensitivity of output power affected by temperature is reduced from 7% to 1%, comparing with the single Nd∶YAG crystal scheme.