Net-catching device for crab breeding

The invention relates to a net-catching device for crab breeding, which comprises a pond body, wherein the inner bottom of the pond body is welded with four L-shaped track main rods; the transition between a vertical portion and a horizontal portion of each track main rod is conducted through an arc portion; the arc surface of each track main rod is annularly sleeved with a clamp ring capable of sliding along the axial trajectory of the corresponding track main rod; and there is a rope net connected with the four clamp rings among the four clamp rings. The net-catching device is convenient touse, not only can automatically catch crabs in the pond effectively, but also can automatically contract four corners of the rope net, thereby realizing automatic net-catching the crabs, and achievingthe effects of facilitating catching and saving the labor. 本发明涉及种螃蟹养殖用的网捞装置，包括池体，所述池体内底部焊接有四根L形的轨道主杆；轨道主杆的竖直部分与水平部分之间通过圆弧部分过渡；每个轨道主杆的圆弧面上均环套有可沿轨道主杆的轴向轨迹进行滑动的卡环；四个卡环之间设有与四者均相连的绳网。本发明使用方便，不仅能够有效地将池中的螃蟹进行自动捞起，还能将绳网的四个边角进行自动收缩，从而