This study considers why public abattoirs of the Republican era failed to function effectively and were unpopular with contemporaneous Chinese people. In the early twentieth century, Chinese officials began to rely on biomedical parameters to define safe food, a critical step in the modernization of social control strategies. Tianjin was among the first Chinese cities to launch government-run slaughterhouses that combined safety inspection with monopolized animal slaughtering. However, how such slaughterhouses operated has received little academic attention. The municipal authorities introduced a series of laws covering slaughterhouses’ construction and operations to ensure meat safety. However, Tianjin’s public slaughterhouses failed to uphold their new duties toward public health and even became menaces to urban sanitation. City officials lacked the ethics of modern public servants, and the slaughterhouses provided them new opportunities for rent-seeking practices. The collection of slaughter tax superseded meat safety inspection as the municipality’s primary concern, which undermined the effectiveness of food hygiene regulation. Therefore, city residents regarded the public slaughterhouses as predatory tax collectors. Taking Tianjin as an example, this article demonstrates the gap between the modernization of governmental agencies modeled on Western countries and the persistence of traditional, exploitive governing practices in Republican China.