The invention discloses a front-collecting rear-dumping type multifunctional water area cleaning boat. The front-collecting rear-dumping type multifunctional water area cleaning boat comprises a collecting device, a first carriage and a second carriage which are mounted on a boat body, the collecting device comprises a collecting face plate, a first conveying belt is arranged on the surface of the collecting face plate, first stop plates are arranged on two sides of the collecting face plate respectively, one end of the first carriage is arranged below the collecting face plate, a second conveying belt is arranged on the surface of the first carriage, third stop plates are arranged on two sides of the first carriage respectively, a rotating shaft is arranged at one end of the second carriage, the second carriage is mounted on the rotating shaft in a turnover manner, a third conveying belt is arranged on the surface of the second carriage, one end, close to the rotating shaft, of the third conveying belt is positioned below one end, opposite to one end of the collecting device, of the first carriage, and four stop plates are arranged on two sides of the second carriage respectively. The front-collecting rear-dumping type multifunctional water area cleaning boat has the advantages that through combination of the collecting device, the first carriage and the second carriage, collection and dumping of aquatic plants are achieved and environmental protection is achieved.