The invention relates to an underwater monitoring cutting collection device, comprising a body structure, wherein a plurality of walking rollers are fixedly arranged at the bottom of the body structure; at least one impeller which is driven by a first motor and is used for propulsion is fixedly arranged at the tail part of the body structure; an operation arm is hinged at the upper part of the body structure; an oil cylinder for jacking and putting down the operation arm is arranged between the operation arm and the body structure; a grinding wheel and pliers, and a second motor and a third motor which supply power to the grinding wheel and the pliers are fixedly arranged at the front end of the operation arm; a search light and a camera are arranged at the upper part of the operation arm; a container for collecting cut objects is fixedly arranged below the grinding wheel and the pliers on the body structure; a wireless transmission module and a control terminal are in signal connection; the first motor, the second motor and the third motor are hydraulic motors; a controller is used for controlling starting, closing and power adjustment of the hydraulic motors; and the camera sends photographed real-time images to a control terminal through the wireless transmission module. According to the device, the working efficiency for underwater observation and monitoring collection of cultivation is improved, and the labor cost is reduced.