The invention discloses a continuous trimming device for carpets. The continuous trimming device comprises a support frame, a support plate, a hydraulic press and a trimmer, wherein electric rotary shafts are mounted on two sides above the support frame, a conveying belt is arranged between the electric rotary shafts, the support plate is arranged in the conveying belt and fixed with the support frame, the hydraulic press is arranged in the middle of the support frame, a mounting plate is arranged below the hydraulic press, an air suction port is formed in the mounting plate, screens are arranged on two sides below the air suction port, and a servo motor is arranged between the screens and connected with the rotary shafts through drive groups. According to the continuous trimming device for carpets, the carpets can be closely pressed above the conveying belt by the aid of a roller, the carpet is flatter and can be trimmed more conveniently, the two screens can trim the carpets twice, so that the carpets can be trimmed more fully, and the device is more convenient to use.