Fixed collection netting gear for tidal flat larvae and juveniles and collection method of fixed collection netting gear

The invention discloses a fixed collection net for tidal flat larvae and juveniles and a collection method of the fixed collection net. A fixed collection net for tidal flat larvae and juveniles comprises a net cage body. The net cage main body comprises a first-section net cage, a second-section net cage, a third-section net cage, a fourth-section net cage and a conical collecting bag which are sequentially connected from front to back, and the end part, far away from the fourth-section net cage, of the collecting bag is closed by a rope; a net opening of the net cage main body is connected with an intercepting nylon wire; a fish guide mesh for separating an inner cavity of the first section of mesh cage is connected in the first section of mesh cage; the end part of the fish guide mesh extends out of the first section of mesh cage along the axial direction of the first section of mesh cage; the net stretching mechanism comprises a first rod body, a second rod body, a third rod body and a fourth rod body; th