After "Jaws" broke the box office record in movie history, Universal Pictures was eager to launch a sequel. In October 1975, Steven Allan Spielberg said at the San Francisco Film Festival that all sequels were bad tricks and ignored the producer's invitation. Under the recommendation of screenwriter Howard Sackler , the producer chose the stage director John D. Hancock as the director of the film, and the producer invited Hancock's wife Dorothy Tristan to rewrite the script. In June 1977, Universal Pictures fired Hancock after a meeting. At that time, the Hancock and his wife had been participating in the film for 18 months, and the filming had to be suspended for several weeks. Karl Gottlieb took over to revise the script, responsible for adding humor and reducing the plot of violence.
Seeing that the filming was blocked, Spielberg intended to take the lead again, but he had already signed to direct "The Third Type of Contact" at that time, and it was only after a year that he could take over the film, and the producers simply couldn't wait that long. In the end, the producer chose Jeannot Szwarc , who became famous with the TV movie "Bug" and the TV series "Night Gallery" . Let Hendricks continue to appear in the film, and remove many teenage roles.
The film continues to use the shark mold from the first episode, and special effects technician Bob Matei recreates the electronic components in the mechanical shark. The island with a power transmission station in the film is actually a drilling pontoon used to coordinate the mechanical movements of the sharks around it.
