The 444 nm blue laser diode pumped Pr3+:GdLiF4solid-state red laser is reported. The Pr3+:GdLiF4crystal with the Pr3+ doped concentration of 1.01% is cut along a direction with the dimensions of 2.7 mm×2 mm×4 mm(a×c×a). Under the laser diode pumped, a continuous wave red light of 639.3 nm is obtained through the plane concave cavity. Several of laser input and output characteristics are gained through optimization of many times. The maximum output power is 153 mW when the pump power at 3 W and the transmittance of the output coupler is 3%. The slope efficiency is 6.78%, and the pump threshold is 750 mW.