Willi Dickhut was born in in Schalksmühle, the son of a haulage contractor and completed an apprenticeship as a fitter and turner. He was involved early in the labor movement. Dickhut participated in the 1920 general strike against the Kapp Putsch; in 1921 he joined the German Metalworkers' Federation Deutscher Metallarbeiter-Verband (DMV)) in 1926 the Communist Party of Germany (Kommunistische Partei Deutschlands (KPD)). After cleavage of Solingen branch of the DMV Dickhut was a member of the communist trade union Unity Association of Metal Workers (Einheitsverband der Metallarbeiter). In 1928–29 he spent eight months in the Soviet Union as a skilled worker in a factory making hair clippers. On his return he was more active for the Communist Party and was elected in March 1933 to the city council of Solingen.
In 1933 he was arrested and taken to "protective custody" (Schutzhaft) until 1935 by the new Nazi regime. Dickhut was temporarily interned with prison stays in the concentration camps Börgermoor and Esterwegen. During this time he was subjected to severe ill-treatment by the Gestapo. After his release he resumed his work for the enfeebled and illegal Communist Party in Solingen. In 1938 he was convicted by the Sondergericht (Special Court) in Hamm to one year and nine months in prison. This judgment was not enforced due to its "protective custody" and a nine-month detention. In August 1944 Dickhut was arrested again and faced then with a death sentence. During a heavy bombing of Solingen in November 1944, he managed to escape from prison.
After the end of World War II Dickhut was a functionary of the Communist Party again, having been Deputy Executive Head of the party executive. In 1966 he was expelled from the party, as he criticized the conditions in the Soviet Union. His work The restoration of capitalism in the Soviet Union was first published in 1971. In it Dickhut developed a fundamental critique of the changes in the Soviet Union after the seizure of power by Khrushchev, which he saw as a betrayal of socialism and the cause of the failure of the Soviet Union.
After his expulsion from the Communist Party, he became involved in the foundation of the Communist Party of Germany/Marxists–Leninists (KPD / ML) and promoted by the division in 1970 in a leading position the union of the resulting KPD / ML (Revolutionary Way) with the Communist Workers 'Federation (ML) for Communist Workers' Union of Germany (Kommunistischer Arbeiterbund Deutschlands (KABD)) 1972 who prepared the 1982 founding of the MLPD accomplished. Dickhut was, since he founded it in 1969, responsible for the theoretical organ of the party, the Revolutionärer Weg (revolutionary way).
Dickhut is considered within the MLPD as one of the "classics of Marxism–Leninism". Two autobiographical publications Dickhuts apply the party as important sources of a blunt and correct view on the 20th century.
He died in 8 May 1992 in Solingen.