1947年3月,美国总统杜鲁门签署第6835号行政命令,对政府公职人员进行了所谓“忠诚调查”,打击、迫害,解雇了许多具有民主意识和进步倾向的政府公务员;1947年6月美国会通过1947年劳资关系法。从多方面限制工人行使组织工会、参加游行、举行罢工等基本人权;1948年4月,美国会制定1948年管制颠覆活动法,规定共产党组织及党员 In March 1947, U.S. President Truman signed Executive Order 6835 and conducted a so-called “loyalty investigation” against public officials in the government to crack down, persecute and sack many civil servants with democratic awareness and progressiveness. In June 1947, the U.S. Congress Passed the Labor Relations Act of 1947. In many aspects, workers are restricted from exercising their basic human rights such as organizing trade unions, participating in demonstrations, and holding strikes. In April 1948, the United States enacted the 1948 Law on Control Subversive Activities and stipulated that Communist Party members and Party members