The invention relates to a bionic fish, in particular to a bionic fish capable of cleaning away marine litter. The bionic fish capable of cleaning away marine litter achieves the technical purposes that time and labor are saved, working efficiency is high and cleaning is thorough. In order to achieve the technical purposes, the bionic fish device capable of cleaning away marine litter comprises a connector, a spring, a bionic fish fin, a guiding plate, a sliding rail, a sliding block, a connecting block, a first swinging rod, a support, a connecting base, a bionic fish, a supporting plate, a second motor, a bionic fishplate, a second disc, an electric push rod, a fishing net, a circular ring, a second swing rod, a third swing rod, a first motor and a first disc. A cavity is formed inside the bionic fish. The support is arranged at the bottom inside the cavity. The front side inside the support is sequentially provided with the guiding plate, the sliding rail and the connecting base from left to right. The bionic fish achieves the effects of saving time and labor and being high in working efficiency, thorough in cleaning and capable of cleaning away marine litter.