The study aimed to evaluate the productivity of Y boars in Bac Giang breed joint stock com-pany. Thirty five Y boars were extracted semen to assess the quality parameters and then insemi-nated for 60 F1 (L×Y) sows. The semen of boars were extracted and stored by TH4 medium in 24h, then the semen was diluted and examined the quality parameters by Ceros II system. The results indicated that, the semen quality parameters such as sperm quantity, progressive percent of sperm, slow sperm percent and number of doses of sperm/times of extraction of semen, all were reached with the semen quality standards of foreign boars. The factors such as breeding, boar old-age, sea-son have a significant effect on the sperm quality parameters of The parameters of semen quanlity of Y boars reach the requirements of TCVN 11910:2018 for foreign boar standards. The conception rate of sows F1 (L×Y) were 93.33% when fertilised by artificial insemenation of Y boars, this is high rate as compare with the standards, qualified for mas production, used in artificial insemination.