Abstract: Objective: To investigate the effective control of blood alanine aminotransferase (ALT) scrap rate collected in the streets.Method: The blood of 492 street voluntary blood donors which were qualified screened by dry biochemical analyzer (ALT<40 U/L) and were not qualified by large full automatic biochemical analyzer examination back to the station (ALT ≥ 40 U/L) were analyzed, so as to find the regularity. At the same time, a random blood sample of 20 blood donors were accurately detected by dry biochemical analyzer and automatic biochemical analyzer, and data was done statistical analysis of linear correlation and linear regression.Result: There was a regularity in the situation of 492 cases with qualified screened by dry biochemical analyzer and unqualified retested with automatic biochemical analyzer. There was a good linear correlation between dry biochemical analyzer and automatic biochemical analyzer r=0.994 0. Linear regression equation was y=0.485 4+0.976 9x. When x value of automatic biochemical analyzer was 40, the 95% tolerance interval of y value of the individual dry biochemical analyzer was:34.57 U/L-44.55 U/L.Conclusion: It could effectively control blood ALT scrap rate collected in the streets with unqualified as dry biochemical analyzer screening limits ALT ≥ 33 U/L, and zero as automatic biochemical analyzer for ALT ≥ 40 U/L back to the station.