罗拉特法案(Rowlatt Act)是指英属印度政府于1919年3月通过的一项法案，其目的针对第一次世界大战期间，在可能出现社会动荡或出现颠覆政府的一切不确定因素下实行紧急状态。这项法案授权政府在未经审判的情况下，有权将英属印度范围内包括恐怖分子在内的所有疑犯逮捕入狱。实际上，也是英国当局压制革命活动的具体措施。

The Anarchical and Revolutionary Crimes Act, 1919 popularly known as the Rowlatt Act, was a legislative act passed by the Imperial Legislative Council in Delhi on March 18, 1919, indefinitely extending the emergency measures of preventive indefinite detention, incarceration without trial and judicial review enacted in the Defence of India Act 1915 during the First World War. It was enacted in light of a perceived threat from revolutionary nationalist organisations of re-engaging in similar conspiracies as during the war which the Government felt the lapse of the DIRA regulations would enable. Passed on the recommendations of the Rowlatt Committee and named after its president, British judge Sir Sidney Rowlatt, this act effectively authorized the government to imprison any person suspected of terrorism living in the Raj for up to two years without a trial, and gave the imperial authorities power to deal with all revolutionary activities. The unpopular legislation provided for stricter control of the press, arrests without warrant, indefinite detention without trial, and juryless in camera trials for proscribed political acts. The accused were denied the right to know the accusers and the evidence used in the trial. Those convicted were required to deposit securities upon release, and were prohibited from taking part in any political, educational, or religious activities. On the report of a sedition committee,headed by justice Rowlatt,two bills were introduced in the central legislature in February 1919. These bills came to be known as "black bills". They gave enormous powers to the police to search a place and arrest any person they disapproved of without warrant. A well known description of the bills at that time was:No Dalil,No Vakil,No Appeal i.e.,no pleas,no lawyer,no Appeal. Despite much opposition, the Rowlatt act was passed in March 1919. The purpose of the act was to curb the growing nationalist upsurge in the country. Mohandas Karamchand Gandhi, among other Indian leaders, was extremely critical of the Act and argued that not everyone should get punishment in response to isolated political crimes. The Act annoyed many Indian leaders and the public, which caused the government to implement repressive measures. Gandhi and others found that constitutional opposition to the measure was fruitless, so on April 6, a "hartal" was organised where Indians would suspend all business and fast as a sign of their opposition and civil disobedience would be offered against specific law. This event is known as the Rowlatt Satyagraha. Gandhiji named the Rowlatt Act as "black act".