This paper proposes a new MOCVD-ZnO coating technology—gradient doping technology to grow textured ZnO:B-TCO thin films.The results show that the gradient doping technology can increase the film grain size and improve the light scattering effectively.In addition the gradient doping technology can effectively improve the optical transmittance of the ZnO:B thin films in the near infrared region,which is conducive to be used in wide-spectrum thin film solar cells.The optimized ZnO:B thin film with the mobility of ～24 cm2/V,resistivity of ～2.17×10-3Ω·cm and carrier concentration of ～1.20×1020 cm-3 is obtained.The total transmittance of optimized ZnO:B thin film is higher than 85% in the nmwavelength range lower than 1 000.