Based on the co polarization pumping technology,the 1.9μmhigh efficiency output of LD double ended co polarization pumped Tm∶YLF laser is realized. The temperature distribution of Tm∶YLF crystal pumped by LD double end co polarization was simulated and experimentally studied. The experiment used a split beam splitter to convert the pump light into the homogeneous polarization injection and built an L shaped plano concave cavity laser by 80mm length. The crystal doping concentration was 3 at.% and the size were 3mm×3mm×14mm,the transmittance of the output mirror is 15%. The power output achieved 14.72 W when the pump power is 47.42 W. At this time,the wavelength of the beam is 1907.6 nm,the linewidth is 1.26 nm,the mass is M2x=3.19 and M2y=3.29,the slope efficiency is 37.24%,and the light to light conversion efficiency is 31%.