The Big Blockade was a 1942 British black-and-white war propaganda film in the style of dramatised documentary.

It was directed by Charles Frend and starred Will Hay, Leslie Banks, Michael Redgrave and John Mills.

It was produced by Michael Balcon for Ealing Studios, in collaboration with the Ministry of Economic Warfare.

[4] This was a propaganda film in which the British strategy of the economic blockade of Nazi Germany was illustrated through a series of scenes and sketches, combined with documentary footage.

[5] The film was not well received by The Times, whose critic in 1942 found that "this particular hotch-potch is, as propaganda, woefully unconvincing.